I have interstitial cystitis and my flares have gotten worse. How to get rid of it?

Hi doctor,

I was diagnosed with IC over a year ago, and at first, the pain was manageable. Now, my flares have gotten worse, especially during my cycle. I have pelvic pain, back pain, and urethral pain, all of which are five times worse during periods. I have been working with my urogynecologist with bladder instillation and my primary doctor for medications. My physician has given me Amitriptyline, Hyoscyamine, and Ibuprofen. None of this touches the pressure pain that I am having during my menstruation. I have tried yoga, physical therapy, and lots of other non-medical treatments. When is the appropriate time to discuss using Opiates during this time of the month for flares? I know it is a sensitive subject, but I have tried all the alternative therapies. This seems like the only logical step, and I know that doctors are too scared to prescribe Opiates because of their side effects. As they are still expected to relieve pain, I would need a small amount to get me through my monthly cycle flares. Do pain management doctors see IC patients? I am a 33-year-old female, and I weigh 240 lbs. I also have other gynecological issues, such as a history of fibroids. Some have been removed, with current ones growing. I would greatly appreciate any advice or help.