So how can you tell the difference between a period and early pregnancy spotting/cramping? I'm on the pill and take it with in one or two hours of the time and if I miss one I double up the next day and we used a condom but it got stuck in me and I didn't know so it got on my thighs and stuff (2-3 days before my persons is suppose to come this happened). My period is suppose to start tomorrow but I've just been stressing because I've been seeing two guys casually and we always use a condom or I have them pull out (which they are both good at) but you know  precum and weird pregnancy stories and I'm a worrier and yeah soooooo basically, how do I know I'm not pregnant?