diarrhea with antibiotics?

can anyone tell me if diarrhea starts 4 days after starting antibiotics? I am ceftin, doxcycline, and flagyl and I feel so bad. also, I am worried about my test results. does anyone get treatment without actually seeing them.

Yes. The antibiotics kill both the bad and beneficial flora in your body. These need to be replaced by probiotics.

I recommend taking at least one broad spectrum probiotic twice per day. More if you can afford it.