You are saying it is her fifth month "after" pregnancy, do you meanshe had kittens five months ago? Do you mean bleeding from a bite, or from her vagina? Do you think she has come into heat again? (It's possible, but it would be a good idea to keep her in if so, since it would be hard on her body to have two litters in such a short time.)
Do you have access to a veterinarian? It sounds like she should be seen.