Sexual Health Concerns & Potential Pregnancy - Seeking Information

Question
Okay so me and this kid had sex about 3 weeks ago, but I'm pretty sure we used a condom, i was under the influence. But like 3 weeks before that or something, i had sex with a different kid, under the influence again, and i don't think we used. I had my period after that, but it was really short, but usually they don't last long for me. But now I'm a little scared, but not to concerned because I'm not really sure when my period is suppose to start. I looked up like symptoms and i have pretty much all of them. I think I'm just more like paranoid more then anything but I'm 15 and my parents would definitely be way mad! What do you think?

Answer
Dear Haley,
The easiest thing to do at this point is to check a pregnancy test.  You can buy them at the drug store.  The instructions are fairly simple.  You can also usually get free pregnancy tests at a local planned parenthood.  A pregnancy test usually turns positive 1-2 weeks after sex, so if it is negative, you are probably fine.  Let me know how it turns out.
Good luck!
Doctor Joan