Hi, I have been taking penicillin for almost a week now for a tooth infection and i am having problems iwht infrequent urination (to the point where I am not urinating at all anymore hardly), also agitation, confusion, weakness, completely liquid diarrhea, flu-like symptoms such as lung congestion and headaches. None of this was happening before i started the penicillin, and I looked it up and it says if you have any of these symptoms to cal your doctor immediately but I do not have one. Should I stop? I am worried if I stop taking it that I will have problems with the infection in my sinuses and tooth, but if I don't stop I am worried that I could suffer kidney failure or something bad. Please help me.. this is getting bad! :(