I have had this problem for many years. It did get better after my hysterectomy (done for other reasons) but I still have it. I also have interstitial cystitis which could be part of it but not entirely certain. I was just finally dx with fibromyalgia about 2 weeks ago after years of trying to figure out what's wrong.

Both my GYN and the Urogynecologist dismissed me saying there's no reason for me to have pelvic pain. They wee both wrong. Pelvic floor muscles can cramp up just like any other muscle in body.

Strange but I was telling my husband close to the very same thing this morning. I havent had a period in a while (in Menopause and had an ablation to stop them) but for the past two days Ive had a lot of pain and pressure in my lower pelvic. Of course, if I go to the doctor, they'll probably blow me off. I just dont go anymore.

I got this feeling when I had kidney stones. You can easily get tested for this at your GP.

I also had a test done that found that my bladder has intense contractions the same way the uterus does. If you don't get any answers through your gyn I would see a urologist or even better a urogynocologist. From what I've read it's very common to have interstitial cystitis with fibromyalgia.