Until you start having more physical symptoms, you will know them when you see them, you shouldnt worry.
My dog is 60 days pregnant, is sleeping more than normal an wanting more attention. Does this mean she is gunna go into labour?
63 days is the normal length of a dogs pregnancy so it is very likely she is starting to go into labour.
When she is ready, she probably can not get comfortable, licks a lot, and probably do not want to be touched, may wine alittle, and walks a lot. Each dog is different. Labor is not not comfortable for any animal.