Bladder pain but no infection

Patient: I am 23 yrs old female about 2 months I am having abdomen pain specifically in left side I feel like the pain is completely in bladder surroundings and also I am having frequent urination but no pain or irritation while urination. When the bladder is full the pain increases after urination I felt some what to be good.I made urine culture and the result is normal. And in ultra sound scan there is a small myoma in 7mm size.My doctor said like there is no reason for your pain by made these 2 tests. But day by day pain increases. I consulted specialized lady doctor. So please help me what I will do next.