Unprotected Sex? Or Not?

bree

Last night, my boyfriend and I were pretty wasted and in another room, we, I actually dont know if this would count as having full on sex, but his penis went slightly inside of me for a couple of seconds and then he pulled out. But it wasnt his entire penis, it was only the tip. I am kind of anxious, and I am debating if I should buy a plan b.

should i? should i not? And if i should where are the cheapest places to get a plan b.