I have been experienced regular headaches, got an early period, noticed some abrupt weight gain (though I'm eating as I normally did before). My period was not supposed to arrive for about 10 more days. And I've never experienced such strong abdominal pain. I am sexually active, if that might play any role in what's going on. But I seriously begin to feel really concerned since all of these changes had occurred. I wish I knew at least what might be the problem before going to the doctor.