My dog is really sick he, has pooped a bright red blood and he vomits and he's not eating. I don't know if we should take him to a vet or not ? please help me!

If you're able to, then this would definitely be the best option. It'll be really difficult to find any treatment suggestions online as there only so much anyone can advise you without examining the dog in person (even if they are a professional vet).

So my advice would be to see a vet if this is an option as, by your own admission, your dog is very sick.