Someone to talk to.

I'm 17 and my boyfriend is 19. My mom always told me your old enough to have sex when you can talk to your parents and not be uncomfortable to talk about birth control. Well I felt close enough to my mom not to hide what I was doing, over this year I've been on the pill. Well I started working a lot more and being clumsy about taking it. So I just stoped in general. My boyfriend came back from vacation last week, and I had not gone to the doctor to see what birth control I wanted to be on next. Well it says that I had sex on my most fertile day. We have not used protection before and nothing happend. So I thought it would be okay but I'm really  scared this time. My question for you guys is, how many of you have gotten pregnet from your most fertile day? I have about 5 more days till I'm spose to get my period, but I want someone to talk to. And it not be my mom. I know I should, but I don't want to worry her. I don't want to be judge my my friends either.