my cycle is due around the 15th of this month, however i have been having mild cramps in my abs for about a week now. plus this morning when i woke up my insides felt a little bruised as if they were shifting or something. i'm a little worried. pregnancy is quite possible, but when i took a test two days ago it was negative. last time i hold intercourse was on the 3rd. help me out guys. should i be worried or pop some midol?