I'm on the pill, but recently switched to the generic brand. I had sex with my boyfriend without a condom. It has only been 8 days but I've had severe cramping and stomach pains. I also had spotting after/during I pee'd but only for the last two days. It does not hurt but i get a tingling feeling that I have to pee, which turns out to always be a little blood. Is it possible that i am pregnant? or does it seem likely it is something else