Frequent urinating at night

I've been diagnosed with a UTI and have had 2 rounds of antibiotics, a CT scan, ultrasound, bloodwork and urinalysis. According to the most recent tests I no longer have an infection and everything is completely clear and in great shape. I still have some antibiotics to finish, am also taking Flomax, and Solfenacin. I'm having the urge to urinate all night and can't get any relief. I have yet to see a Urologist, am waiting for a referral. Two nights ago I only woke up twice to use the restroom so thought things were improving but then last night I was up all night, I'm confused as to why it would be great one night and not the next? I'm also doing Kegel exercises. I don't understand what is happening to me but appreciate any thoughts.