I m an 18 year old female and I m a few days into my period. I take birth control and lamotrigine. Within 5 minutes of a bowel movement I tried to pass gas. Nothing came out and instead I was hit by acute pain in my lower-right abdomen bad enough to make me double over. I m not sure if this is appendicitis or just menstrual cramps... The pain subsided quickly and has been replaced with a very dull ache like a hand being pressed there. The weird pressure pain now inhabits the area from my rib cage to my hip bone on the right side of my body. I can pull my knees close to my chest or press down on the area without any pain. This is weird though and I ve never experienced anything like it. It may be worth noting that I suddenly got itchy all over just now. Anyway, this is freaking me out and I don t know if I should go to the emergency room. Please help.