It's not a UTI...so what is it?!?!?

Heres the facts:For 3 months i've have burning when i pee.Doctors thought it be bladder infection because here WAS germs, so i took antibiotics, 3 times! but it didnt run away.No STD's, not a yeast, not a bacterial infection.they did a cystoscopy and found nil.There is no more microbes..since i took the antibiotics but the burning is still within. I usually dont own frequency but sometimes do... One afternoon it wont burn adjectives time and the subsequent it will burn for hours. I am not have sex. I am on Ortho tri cyclen birth control but started taking those pills after i have these symptoms so it cant be from that. My urologist say i should bring this surgery that shows if i enjoy interstitial cystitis. Other doctors don't reflect i own it,one-sidedly dont construe i enjoy it... What else could this be...it is excruciating when it starts burning. Also when i enjoy frequency (which isn't adjectives the time) it freshly drips out rather bit when i push the urine out. Its not the laundry detergent any.thoughts?
Answers:

Why is my term lighter?

Have they checked your kidneys? This sounds approaching a prob that several member of my kinfolk hold have (including my aunt and myself) that the doctors still can't find a wreak or cure for. I own be through the wood works of test and probs and laproscopic(prob. spelling that wrong) surgeries and finally in recent times give up beside trying to find the root and only matter beside the stomach-ache. I did however enjoy 17 cluster cysts removed during adjectives this, and they did blanch up a bit afterward... So, my advocate is to at most minuscule get hold of some oral exam or a laproscopic to rule out the cysts.. they could be nearby and you never know. Good luck on your quest, and I hope you grain better soon. =)