I'm 15 and had unprotected sex and now I don't know what to do

If this happens within 5 days and you want to consider emergency contraception, you should see your GP or go to a young people's contraceptive clinic in your area. Otherwise you will need to wait until your period is due and then take a pregnancy test. You should also go and be tested for sexually transmitted infection. You can get the details of a clinic from NHS choices. If you would like more information or someone to talk to about issues surrounding unprotected sex you can find a centre near you.