Me and a guy had sex about two weeks ago (my first time) unprotected, and it was only a sec, next thing I knew he pulled out and his stuff shot out really fast. Well, according to him, he didn't come in me, but was close. But I'm not fully sure. He kept telling me I won't be pregnant but I don't know, don't fully understand that whole section of sex and stuff. Could I have mabye gotten pregnet? I started my period two days ago. But I don't know, my period is about every other month etc. I just want some guidance and info if possible please.

Even if he "pulled out" there are sperm in the early fluids, so of course you can still get pregnant. Also no method of birth control, pills, condoms, morning after pill, none are 100 percent, so anytime you have sex you can get pregnant.
You have to wait till the next months period, time for it, and then test if you don't have a period

What about a pill called plan b? He had me take that the two days later,forgt to mention that