I'm really scared right now. My boyfriend and I were Messing around 2 nights ago and we didn't have intercourse but I think some of his semen may have entered my vagina. What is the chance of me getting pregnant? My last period ended about 8 days ago. If the chance is high, what should I do?

You didn't have intercourse but his semen entered your vagina?

Then, yes, you could be pregnant. That is often the result of semen in a vagina.

When you are 10 days late buy a HPT and use it according to the directions.

You are playing russian roulette with pregnancy - but I'm sure you know that. We see a lot of posts about pregnancy which start with "messing around."

What do you consider "messing around" to be? Some form of penetration? Something else?

So you're still young and don't know how it all works, right? You should not be having sex if you are not old enough to understand it and take the responsibility that goes along with it.

If, somehow, his semen did get into your vagina, then yes, you could be pregnant. Are you? We don't know. Now you will have to sweat and worry until your next period is due.