Is it really negative?

I'm on a combo pill but am nervous because my SO came in me. I take it at the same time everyday, never miss a pill. I've had cramping for a week and my expected period doesn't come till Sunday. (I start my placebo pills Friday) I've taken 2 pregnancy tests (both early tests that can be taken 5 days early) and both are negative. Do you think there's any chance I'm pregnant?? 
This cramping is just freaking me out!!! I've had it for a week.