Why not get to a GYN and get checked out and be brutally honest with the doc?
I never experienced what you are experiencing...particularly at your age (yes, I got sober then for a short period of time, but all was okay back then and quite on time).
At 50, it took about 3 months to get "normal" and I guess my body still thinks it's much younger than it is....at 52 (2 years sober plus 2 months) I am more "normal" than ever and I can tolerate the pain (I used to numb it with alcohol and drugs and had serious PMS/PMDD).
Please see a medical professional!