Am I pregnant?

I'm 16 and I had sex with a guy a few times about 3 weeks ago we only went a few seconds without a condom and than he put one on he said he never came in me but my period is a week late and I've been a bit nauseous and the first week and a half of that month I missed days and was taking my birth control at different times. I don't know if I'm just sick or pregnant but I'm freaking out and I can't go but a pregnancy test either or see my doctor so I need help