First question would be that you did your post whelp exam and are certain that was the only pup and she isn't now in danger from the others decaying or anything and there were no other complications? She'll whine if she's in pain and/or not feeling well too and if she is still producing milk so keep an eye out for infection there as well. If you hadn't done that then that's your fist priority.
Unfortunately you just have to wait it out and could take a little while for the hormones to disperse. When they have pups there are certain hormones released so right now her body is literally telling her there are things she should be doing and that she isn't is probably making her anxious. Try to keep her occupied and engaged and play with her a lot. You can also discuss spaying her with your vet since you are on notice her individual mothering behaviors aren't to your liking. She is just as likely to display the same or similar behaviors with actual pups and may be so overzealous that she needs constant supervision with the pups. Good Luck.
http://www.americanshihtzuclub.org/
q3525724.html#a2810229
Unfortunately you just have to wait it out and could take a little while for the hormones to disperse. When they have pups there are certain hormones released so right now her body is literally telling her there are things she should be doing and that she isn't is probably making her anxious. Try to keep her occupied and engaged and play with her a lot. You can also discuss spaying her with your vet since you are on notice her individual mothering behaviors aren't to your liking. She is just as likely to display the same or similar behaviors with actual pups and may be so overzealous that she needs constant supervision with the pups. Good Luck.
http://www.americanshihtzuclub.org/
q3525724.html#a2810229
When whelping is imminent the female often stops eating (although this is not always the case) and her rectal temperature often drops below 38.1oC (100oF). The female will often go into corners and start scratching to make her bed. If you see any of these signs, you may wish to contact your veterinarian since this is the first stage labor when the birth canal starts to dilate. This is followed by second stage labor when the female starts to forcibly contract her uterus. These contractions start gradually and increase in intensity, frequency and duration. If intense contractions have been occurring for 20 to 30 minutes without a puppy being delivered, it is important to contact your veterinarian. Other situations where veterinary help is needed include: 1. A mother straining for 8-10 minutes with a puppy or fluid filled bubble stuck in the birth canal2. A female with a body temperature of more than 39.5oC (103oF)3. Bleeding from the vagina for more than ten minutes4. A green discharge from the vagina without puppies being born Are puppies, like babies, sometimes born prematurely? Premature delivery does occur but it is not as common as thought. Often these so-called premature deliveries have been an error in mating dates or a miscalculation in gestation period (period of pregnancy). This is usually 63 days. How can I tell if the pups are premature? Truly premature puppies may be small, thin and have little or no hair. Survival is possible but they require an enormous amount of care and often have to be hand fed since they are unable to suckle. Sometimes they have to be fed by stomach tube (gavage feeding). If necessary, your veterinarian will show you how to do this. Mothers will often reject premature puppies and they soon die of hypothermia (low body temperature). Excessive heat (hyperthermia) can be just as harmful as hypothermia so the temperature of the puppy’s environment must be carefully controlled. Environmental temperature must be maintained at around 30oC (90oF) and the box must be large enough so that the puppies can move away from the heat source if necessary. 
The puppies must also be kept in a moist atmosphere if they are being raised away from the mother. The mother usually licks and cleans the puppies frequently. As a result, not only is the environment warm, it is also moist. You can provide a moist environment by placing warm, damp cloths in the box with them. How long will I have to hand raise premature puppies? Once the puppies are stronger and able to suckle, the mother will very often take over herself. It is very important to try and ensure they are fed her “first milk” which contains necessary antibodies to help prevent infection. If the puppies can suck we will show you how to hold them on to the mother’s teats. If this fails, we will advise you on milk replacement and proper puppy bottles. Although very rewarding if the puppies survive, hand raising puppies is extremely challenging and many puppies fail to survive. Are some of the puppies likely to be stillborn or die after birth? With animals that have multiple births, like dogs, it is not unusual for some of the offspring to either be born dead or to die shortly after birth. Sometimes a stillborn puppy will disrupt the birthing process resulting in dystocia or birthing complication. At other times the dead puppy may be born normally. Determining the cause of these neonatal deaths is often impossible without a full post mortem (autopsy), including bacteriological examination and submission of tissues to a histopathologist. Some causes of neonatal death can be prevented. It is important to consult with your veterinarian regarding any problems with your pet’s pregnancy or whelping. I am told that with some breeds Caesarian sections are more common than a normal delivery. Is this true? Unfortunately in certain breeds there are strains and families that do seem to have increased risk of dystocia (difficult birth) resulting in the need for a Caesarian section. The timing of this is always difficult. If performed too late it can result in dead puppies and if embarked upon too early, it may have subjected the bitch to unnecessary surgery. It is a matter that always requires full and frank discussion between you and your veterinarian.