I have been to the emergency room twice and I have been sent home with antibiotics. But I continue to have watery diarrhea, nausea, stomach pain and back pain. I found a little blood in my stool as well. I’m a 30 year old female, and this has been going on for months. My father died 3 years ago at the age 45 of colon cancer. in tired all the time but have problems sleeping. What should I do?