bacterial infection
"Started this medication yesterday and on other antibiotics I usually start feeling better by now. If anything I feel worse and I have every side effect, I mean the runs, the cramping, the gas, the bloating, the head pounding, the dizziness. I don't know if I can choke the 3rd pill down tomorrow. I am just miserable. 

Oh and I'm taking it for a middle ear infection and the pain is still so great, it just adds to the other side effects and its rendering me useless for things I need to do like go to work or function in general. My advice, see if a different kind of anti can be given to you."