Have had what feels like a bladder infection. My Dr. tested for infection,and there is none, so will not give me antibiotic. This has been happening to me at least once a year for 20 years. Taking o/c azo, which is like pyridium, not as strong. Waiting to see a urologist, appointment in 2 weeks. Now I have developed leg cramps when I try to sleep. Is this from the o/c meds, or is it low potassium?