Hello so I had sex with my boyfriend and the condom slipped off. We immediately went to the store and I took a plan b about 30 minutes after sex. I'm extremely crampy and it's now been 11 days since. I usually get crampy before my period but I also looked it up and it could be a sign of early pregnancy? I took a pregnancy test today and it came out negative. Is it too early to tell? Help I'm super anxious and freaking out I'm only 17.