Possibly pregnancy

Last night, I lost my virginity to somebody who I had been talking to for a matter of months. I don’t remember the ins and outs of what happened as I was fairly drunk. I didn’t see it happening, one thing led to another and then he was inside of me. He wasn’t wearing a condom and I’m not on any contraception. He did pull-out however. I think he came on my chest and stomach, despite this, I don’t know for certain as - like I said - I was drunk. I am also worried about precum. I tried going to a pharmacy today to ask for the morning after pill however, the pharmacy was closed. I’m not sure whether they give the morning after pill out free either, as I’m under the age of 16. Would there be any way to ask to speak privately to the pharmacist? I’m just very worried. I don’t want to be pregnant, especially when this has been the first time I’ve ever had intercourse. A friend suggested this app to me and so I hope it helps. I’m also not 100% sure when my period begins. If somebody could suggest what the hell I should do, I would appreciate it. As soon as possible too, as time is running out.

Update:

I went to a clinic today with a friend of mine and got the morning after pill. I’m due a pregnancy and STI test within three weeks and I’m considering going on the contraceptive pill.