Well my period normally lasts 4 days and I have a cycle of 7-14 days. My BF came in me both times and I really want to know if I can get pregnant.

Always possible, no matter what point of your cycle. There is never a completely safe day or days. Only more or less likely days. Apparently he really WANTS you to get pregnant because it wasn't an accident. A guy knows before its too late.

You have a cycle of 7 - 14 days??

It's less likely, but definitely possible.

Are you trying to conceive? Is that why you're having unprotected sex?

While a much lower chance, yes there is a chance.

Yes, it's possible. Sperm can survive in your uterus for a few days. If an egg is released during that time, then it can result in pregnancy.

If you don't want a kid right now, then you need to practice safe sex.