Possible UTI for over 3 years, help :(

Hi!

I’ve been struggling with my bladder for over 3 years now. One day after I’ve peed I felt stinging in my urethra. Took some pills for UTI and it was gone for a 2 weeks or so, and then came back again. I’ve been seeing a lot of different doctors for past 2,5 years and nothing, best I’ve got so far was some stronger pills than I can get normally at a drug store. Took a pee and blood tests, the results came and they looked just fine :| I couldn’t tell how many things I’ve tried, but to list some: different meds for UTI , some meds from gyno , lemon juice, cranberry juice, utrica juice, D-mannose...

How it is right now: Pretty bad, I get this awful stinging feeling almost every day now. Drinking LOTS of water helps me, but I have to drink it till I’m starting to feel nauseous. Then I go and pee and it’s fine. I drink a lot of different fluids throughout the day, but I usually feel thirsty and my mouth and throat are dry. I can feel when more severe attack is coming because I will get cold, I can describe that feeling as if somebody would put cold water inside my veins.

If somebody can give my some advice, help in any way, please. I’m currently a student and it’s really frustrating when I just can’t go to classes, because of this. Feel free to ask any additional questions.

Thanks in advance