I've had a camera in my bladder to check for things like IC, and I was told that they have to distend it to see the bladder wall correctly - the urologist described it as 'stretching the bladder'. I point blank refused them to do this as I said I didn't have a capacity issue. They didn't see anything wrong though - but I still had major pee issues.
Can you think of any foods or drinks that you have ingested a lot of before your bladder became irritated?
I did the j.v juice diet and on day 10 I had the same urges you describe. I've since discovered that foods/drinks high in potassium seem to affect my bladder, as does caffeine.
I wanted to pee all day long and I mean 24/7 I had the desperate urge to pee (it's awful), and the sensation is unbearable. I did answer the urge to pee even though tiny dribbles came out. That felt like some kind of relief, but in minutes the pressure and urge would build up again. I continued on like this for many months, even though there was no infection. Some days were better than others.
Anyhoo fast forward 3 years and on and off I still have issues, at the time of the major pain I was tearing my hair out. I ended up with constant pressure in my bladder and severe burning pain as if it was on fire. I cut out every drink except from water. Cranberry was a def no no.
One thing that did help was trying to wait and not pee every 5 minutes like I felt I wanted to. Drink lots of water. Maybe they will send you for urodynamics. The main thing is not to worry, I know how much this takes over your life. Another thing I can think to try is to completely relax your pelvic floor. This can sometimes lessen the urge. Apparantly as the bladder fills our muscles relax.
They can also give you tablets (i.e vesicare) which can calm your bladder down and dampen the urges. I'd go for the referral and have a chat to see what else they can try for you.
I hope you feel better soon x
oops, have you checked the cobfoundation website, or the icnetwork site, all good info on there too