I have had chronic runny tummy for a long time, weak legs, chronic tiredness and frequent urination and wet, clammy body. The Dr did a stool test & it came back that I had a bacterial infection. After three days of taking the Purmycin I feel totally weak, vomiting,my tummy still running, clammy wet head and body. This is the third time since January that I have had a bout of vomiting. Is it the meds causing this or a reaction from the infection. I am booked to go for a colonoscopy and gastroscop, should I still go for it, I really didn't know that a bacterial infection could cause you to feel so ill.I also suffer from fibromyalgia and never know if it is that making me ill. I look forward to hearing your comments.