Yes you can get pregnant while on your period. Yes there is a slim chance that you got pregnant. Even though he didn't ejaculate there is a substance called precum, which is a mixture of lubricant and semen that comes out of the penis in small amounts during intercourse. If you miss your next period then take a pregnancy test.

There is a possibilty that you might get pregnant. Maybe you can track if you were fertile at the time. I hope you keep up with all this do you remember your last 2 periods? Do you take your temperture ( bbt ) if not you can start today, all you have to do is buy a body bascal thermometer @ walmart. You check it at bed temperature, before you get out of bed. It goes like this : if your temp is 98.4--98.6 for 14 to 16 days in a row thats a sign of pregnancy.

I know the same happened to me ( as far as the unprotected sex) but I wasn't fertile. Believe me I was stressing for two months over this.

And for crying out loud don't believe your boyfriend all the time. I love my boyfriend but sometimes I think his penis takes over his mind. And whatever promises he made to you as far as: "when I come i'll tell you." remember it takes 2 to tangle. But it takes 1 to think. I hope things go well.

Very unlikely that you can get pregnant while having your period. Yes precum can cause you to get pregnant, but when you are bleeding you are generally unable to get pregnant. Usually ovulation occurs 10 to 14 days after you first start bleeding. I highly doubt that you are pregnant, but better safe then sorry. But when you are not on your period and you have sex even if he pulls out men do precum and they may not even realize it.

If your worried about getting pregnant I would suggest using a condom