But I have no money to send him to a vet right now what should I do?

You find the money.
Surely you knew the expenses of a dog before you got a new puppy?
This could be something very deadly.

Blood from stool is never good. Try and find a vet that will work out a payment plan.

You need to find the money, like suggest work out a payment plan. If you can't offer your dog the medical attention she deserves, than you need to think about surrendering her to someone who can afford proper medical care.

There are way too many possible reasons that there is blood in the stool. Even worms at puupies age can be deadly.