Talk to Gynecologist on PMS, Bowel

Hi, I wanted to consult about some symptoms I experience every month before my period starts. Around a week before my period, I feel a dull, aching pain in my lower right abdomen, near the bone, close to my vagina. It gets worse if I move around, but eases if I lie still. I also get frequent bowel movements and a lot of gas.

On the first day of my period, the pain becomes so intense that I can’t even get up. As soon as I stand, I feel the urge to have a bowel movement. I also feel nauseous, can’t eat anything, and even if I do eat, I feel the urge to go to the bathroom again. I feel very sleepy and exhausted, and there’s a constant feeling of pressure and weight in my bladder, like I need to pee all the time, but I can’t urinate properly.

These symptoms ease only if I rub the area or masturbate. After the first day of my period, I feel completely fine again.

Can you please help me understand what might be causing this?