A little over a week ago, I began to have symptoms of a uti. I took Uristat and drank cranberry juice and waited for it to resolve. 3 days ago, i started feeling nausea, achy, had a headache, and was constipated. I went to urgent care and was given antibiotics, yesterday. Last night and this morning/afternoon, I have had diarrhea many, many times. I am also very lethargic and nauseas. Will this improve as I continue the antibiotics? And how long will it last?