On Wednesday June 18th my boyfriend and I had unprotected sex. He did not come inside of me but he did precome, and I'm aware that it's possible to get pregnant from precome especially since he did come before the sex. I read that it's possible that leftover sperm could be in the precome which could lead to pregnancy. So I woke up with really bad stomach pains on Friday the 20th, while this could have just been from having too much junk food and pizza the few days before, I did get the runs, and I still got pretty worried. On Saturday I took a pregnancy test that came back negative, not realizing it was probably too soon to be accurate. Once I realized this, I took a plan B pill which was on Sunday. I'm worried because the directions say it'll only work up to 3 days, but I read it would work up to 5 so I took it on the 4th day after the sex. After the pill I felt completely fine, but today is Wednesday and for the last two days I've been experiencing cramps with no bleeding, and cold symptoms which I read are both pregnancy symptoms. I'm really worried that I'm pregnant, I'm stressing it a lot so this could also be delaying my period. Generally my periods are about 19 days apart, which I know isn't really normal but it's my cycle, and my last period was from June 1- June 6 so technically I'm late. I also read that sex and the plan B can also alter your cycle, I'm not sure how true this is but I'm hoping this is the case. I'm 17 years old and this was only my second time having sex, and with the same person. I'm aware of the stupid decision we made and this scare alone is enough for me to refrain from having sex for a looooooong time.