From last 2 months around mid Burning feeling in my penis before and after urinating.i took 10 days antibiotics but get little relief..very little pain sometimes at my back .i drink around 5 to 6 litres water and have to pe 20 to 25 times a day.discontinuous urine flow..my urine culture test comes negative all the time..does interstitial cystitis have same symptoms??.but i don't have any chronic pain in my pelvic areas