So I started my period last month on the 16th. I messed around with my boyfriend on May 25th. He put just the tip in for less then 5 minutes. I'm a virgin. He jacks off all the time so he knows when he's about to an stuff. He swears he was no where near , but I'm still scared. I'm late for my period by 3 days and I'm freaking out. I might be late because I just recently started exercises at a hard level the other day. I have mild cramps like my periods coming and feel the need to urine frequently even when I don't have to. Our parents would both kill us, so we can't really take a test. HELP? ASAP!

How old are you?
I can tell you that stressing out is not going to make things any easier. This could be the reason why your period is late. All because of stress. Your hormones don't know how to react to your body when they are not functioning properly. You need to stay calm. And just because he didn't ejaculate inside of you, he was still inside of you and pre still has semen in it, in which can get you pregnant. If you're scared of getting pregnant than why are you having unprotected sex? Or having sex at all? If you're not ready for a baby than you're not ready to have sex. All it takes is ONE time.. thats it. Whether he's inside of you for under 5 minutes or 15 minutes. It doesn't matter how long. I would be taking a test or seeing your doctor.

Our parents would both kill us, so we can't really take a test. HELP? ASAP!

You do realize that if you're pregnant, not taking a test won't change that? Right?

There's plenty of sperm in precum to get you pregnant. Any entry of the penis into the vagina, even if it's only the tip, can cause pregnancy.

Wait a week. If you still haven't gotten your period, try a pregnancy test, or wait 9 months and hope for the best. Won't change anything.

Good luck.

If he was in, just the tip for 5 min, there was other early fluids that have sperm.
So pulling out does not do it.