I went to the ER because I had sudden severe unexplained pain in my stomach, around my belly button. The Dr ran every test possible (pelvic exam, internal ultra sound, cat scan, urine test, blood test, STD testing)and we came up with nothing. Also I am 8 days late on my period which has never been late. I haven't been able to sleep at night because I have this feeling that something just isn't right. Has this happened to anyone else?