I had unprotected sex on oct 18th. I'm on birth control but had missed a couple pills here and there. I took a test on nov 21st and it was negative but I can't shake the feeling of being pregnant. I'm thinking that if I was pregnant I  would have for sure been positive on the 21st. But I took two tests. The first one had a faint line and the second was negative using the next mornings pee. But I don't have a period because my birth control cycles are every 3 months but what had me worried and wanting to test was because usually if I miss more than 1 bc pill in a row I will start spotting or even start my period and I had nothing. No spotting no nothing.