Bladder irritated after UTI

[trottreacle]

So after unprotected sex a couple few weeks ago I got cystitis. I had a short course of antibiotics which didn't work. I just had a shadow of discomfort then it got bad again and I was positive for UTI so I decided to drink heaps of water to flush it out. I drank a lot of water. About 600ml per hour and then I became dizzy and disorientated. I had to go to hospital I thought I was going to die. I had given myself water intoxication as my sodium had gone dangerously low. I was given antibiotics and have continued to drink frequently. Last night I got the same dizzy episode so went to hospital again, low potassium this time even though I hadn't drank that much. Anyway, my urine came back clear of infection but I am still having extreme pain, pressure to wee and a lot of the time nothing comes out. I feel like I've got cystitis again but my results were negative but this pain in my bladder is unbearable. The doctor at the hospital said it is just the irritation and it will go away but it seems to be getting worse. They have given me some sachets to drink with which is essentially bicarb soda and they're not making a blind bit of difference. I am having panic attacks because of the pain and anxiety related to the fear of drinking too much water which I can't do any more so chugging back water isn't an option either. I feel miserable and don't know what to do. I'm from the UK here on a holiday visa and this is a really scary problem to have far away from home. At the moment ibuprofen is assisting with the pain and gives me a few hours of relief but this can't go on. Please help.

[DragonHater]

You may have Intersistial cystis. I have it. https://en.wikipedia.org/wiki/Interstitial_cystitis