Originally Answered: stomach pain.?
Abdominal/pelvic pain that is similar to that of period cramping may indicate a problem in a reproductive organ (like the pain around your ovaries or uterus).
This includes conditions such as endometriosis (when tissue from the uterus is displaced to somewhere else like the pelvic wall or ovaries), uterine fibroids (thick bands of muscular and fibrous tissue in the uterus), ovarian cysts, ovarian cancer (rare), or pelvic inflammatory disease (PID) infection of the reproductive organs, usually from a sexually transmitted disease.
If you have pain in your ovary area, you might have an ovarian cyst. I have experienced that same type of pain whenever I have had an ovarian cyst. I was also diagnosed with endometriosis last year which caused me severe pelvic pain and intense and painful period cramping.
If a gynaecological reason cannot be found for the pain you are experiencing, then it could be a gastroenterology problem which could be caused by excessive gas, chronic constipation, viral gastroenteritis (stomach flu), IBS (Irritable bowel syndrome), heartburn or indigestion, gastroesophageal reflux, ulcers, cholecystitis (inflammation of the gallbladder) with or without gallstones, appendicitis (inflammation of the appendix), diverticular disease, including inflammation of small pouches that form in the large intestines (diverticulitis), bowel obstruction (in addition to pain, this causes nausea, bloating, vomiting, and inability to pass gas or stool), food allergies, food poisoning (salmonella, shigella), hernia, kidney stones, UTI’s (urinary tract infections), pancreatitis (inflammation of the pancreas) or dissecting abdominal aortic aneurysm (bleeding into the wall of the aorta).
Based on your symptoms and what you wrote, I would recommend that you should see your doctor/gynaecologist, and if nothing is found that you see a gastroenterologist just to rule out any serious GI causes.
Good luck :)