Took it for 30 days for prostate infection. Fixed it, but then l...

Took it for 30 days for prostate infection. Fixed it, but then like an idiot I took Nyquil for a cold/flu which caused enlargement of prostate and subsequently backwash of urine which infected prostate again. Then took Cipro for two weeks, then Flomax to shrink prostate for 1 month. Infection came back. Starting on Bactrim for another 30 days. When taking Bactrim for first two weeks only had dry-mouth. When I refilled at different Walgreens (this one in Marietta, GA) I immediately got bad headaches. These only lasted a day or two, then back to dry mouth. Please note: was taking sulfameth/trimethoprim, the GENERIC form of Bactrim.