A.M.
I am NOT giving you a diagnosis...however, I have Interstitial Cystitis (a bladder disease) that causes some of the same symptoms you are describing. Mine went undiagnosed for over 5 years...and my kidney disease (loin pain haematuria syndrome) went undiagnosed for 10 years. They honestly thought I was seeking pain meds. Far from the truth...I was REALLY miserable! After being diagnosed and knowing how to deal with it and what to eat/drink I am living almost pain-free.
I would recommend seeing a urologist and gynecologist. I spent a month straight in the hospital and had every test ran...got kicked out. Switched doctors...and all it took was a scope inserted like a catheter (not too painful actually) to see all the lesions in my bladder. The lesions (hunners ulcers) were causing bladder contrations and immense pain.
I wish you the best of luck!