I'm concerned about what's happening to my body

unprotected sex always carries a risk! you should do a home pregnancy test!

I'm not saying you are probably pregnant, but you are well aware there is a possibility, so its best to be safe than sorry :-)

I agree, you should definitely do a pregnancy test as soon as possible. If you cant get a test yourself you can go to your local family planning and they will do a confidential test for probably no cost at all. Also I would encourage you to talk to a parent, guardian or someone you trust about the importance of safe sex. If your boyfriend is only using the pull out method not only are you at risk for becoming pregnant you are also at risk for an STD. If you dont have anyone to talk to that you can trust making an appointment with family planning is an excellent option, aside from testing you for pregnancy they can also offer you advice on contraception methods that will give you the best protection and they give out condoms for free. You are at an age where you can make certain decisions for yourself the choice to be sexually active is one of them but you should make sure you are well informed and prepared. Talking about sex can be awkward but dont let embarrassment keep you from gaining the knowledge you need to have safe, healthy sexual relationships. Family planning isnt just a service for teenagers, I am 24 (still a college student) and I use their services. :-)