Hi. I get random sharp pains under my belly button wand I can't move until it goes. Also random cramps on left and right abdomen. 21-Woman. Am active.

Mittelschmetz. It could be ovulation pain if it occurs in the middle of your menstrual cycle. It could also be an ovarian cyst from an anovulatory cycle. Should the pain not be associated with your menstrual cycle, please make an appointment to see your family physician or OB-Gyn.
Abdominal pain. Without a workup we can't be sure but most commonly we see that with irritable bowel syndrome. Do you have gas, stool changes? Have you had previous abdominal surgery?