vaginapagina | PLEASE HELP ME I AM TERRIFIED (Reply)

i made a huge mistake. i just turned 18 a few days ago, and i ended up having unprotected sex for the first time in my life the night before last. he pulled out but i know that doesn't really matter. it happened right after i got a speeding ticket and i was crying and drunk and it was like 2am and i didnt even want to do it at all. i felt sick while it was happening and now i feel even sicker. i know i don't have to justify it because i am just asking for help and i can't go back and change it. i just want to erase the whole thing. i wish this never happened, i feel like i've ruined my body. i'm terrified that i have diseases now, but even more so i'm terrified that i'm pregnant. i don't remember when my last period was, but i think it may have been more than three weeks ago. i don't have the money to buy plan B, because i need to use all the money i have for my speeding ticket. i'm a mess and i don't have anyone to go with me to the clinic, but i am terrified of going alone.

1. can i get emergency contraception for free from a pharmacy without having to go to a clinic?
2. have any of you tried EC before? what were the side effects like?
3. how soon can they test for STDs? HIV/AIDS if different?
4. is it at all possible for me to know NOW if i'm pregnant? i don't want to put my body through such high doses of hormones unless it's absolutely necessary
5. will EC have a harder affect on me if i'm small? i am 5'1" and 90 lbs, and react strongly to most drugs

any help would be GREATLY appreciated, seeing as there's no one i can talk to about this. i'm afraid that if i call the EC hotline number it will show up on my phone bill and my parents will see it, or i'll just start crying and not be able to get my head clear enough to ask the things i want to ask

please don't just tell me how incredibly fucking stupid i am, believe me i know that.