So I had on underarmour boxers while my girlfriend was naked on top of me and we were dry humping I guess for awhile and when I ejaculated I think I was inside of her but she didn't feel anything and boxers were soaked. She has really irregular periods throughout her life and she doesn't have any symptoms of pregnancy yet. It was on the 13th.

Not very good sex if you don't even know if you were inside of her or not,
If you were inside of her yes she can be pregnant, When you get naked and have sex you can expect to have kids and become parents.

This is a bit sad. You don't know if you were inside of her, and she didn't feel anything. Not really a great sexual encounter if you ask me.

Bottom line, you don't have to be inside of her to get her pregnant. It is rare, but pregnancy can happen if you just ejaculate near the vagina.

If you were inside of her when you ejaculated then the odds go up considerably.

You'll have to wait and see.

Keep playing these games and a pregnancy will happen sooner rather than later.

I could have been more clear, I know I was inside of her with my boxers on and I know I ejaculated inside but with my boxers covering me. And I meant she didn't feel anything when I ejaculated. We weren't trying to have sex, if we were I would have taken my clothes off. Just fooling around

I hate to burst your bubble, but boxers don't protect against pregnancy. Even condoms fail many times, and they're actually made as birth control. Boxers aren't. Also, the majority of women don't feel it when the man ejaculates.

As for you being clear, no, you really weren't.

But that's not important. The important thing is that you did have unprotected sex, and that means that pregnancy is a very real possibility.

She had her period, so am I in the clear?

Yes. The lack of period is indicator of pregnancy, not vice versa... might I suggest learning a bit more about how your bodies work before engaging in sexual activities again. Good luck.