I was on BC for the last two months and this month I took myself off of it because I didn't feel right. Well me and my fiancé do not use protection we use the "pull out method" I've been feeling tired and nauseous and have sore breast and headaches I'm emotional and have diarrhea and sharp stomach pains. I took a 88 cent pregnancy test from Walmart because I was on my way to work and that was all they had and it came our negative. Should I worry still or? And I should be getting my period tomorrow according to my calendar