i skipped my periods for 2 months in a row. then i had periods for 4-5 days which was as good as spotting. after that (when i was no longer bleeding) i have been having stomach cramps and abdominal pain like i have during periods. i am not planning for a baby now. my husband and i use external contraceptives. i tried pregnancy test a few times which says that i am not pregnant. i am confused. please help