My cystoscopy showed nothing but Im in so much pain still.

I just had a cystoscopy and it showed no visible signs of damage and/or inflammation. But Im still suffering from severe pain in my bladder.

My bladder pain started 4 months ago after an UTI, the bladder pain never went away even if the infection got cured.

Im waiting to try bladder instillations, but Im curious to know if instillations have helped against the pain even if the bladder wall appears to be healthy/normal?