I have 9 week puppy. We bought her home when she was 8week old. First week she was vomiting and had diarrhea. So we have to take her to vet and admitted her in the hospital for iv. Next day we bought her home and she started acting like puppy. Past few days we started noticing blood in her poop. I took the poop to the doctor for the checkup and test came negative for parasites and Parvo virus. I don't know what to do. I am worried. Please help me