Don't worry, relax and stay calm. I highly doubt that you are indeed pregnant since you have used protection which is highly effective. But for reassurance you can take a test a soon as you missed your period. Most pregnancy test state that they are accurate 1 day after your missed period.
Since you are young and probably not ready for pregnancy and parenting, I would advice you to use birth control (like BC pills, ring, patch, shot, etc.) AND condoms. This will lessen the chance of you getting pregnant. Anyways, if for some reason you can't consult a doctor because of privacy reasons (your mom would find out), you can always go to teen healh clinics and planned parenthood clinics near you.
Depending on the place where you live, they will offer most of their services (including consultation, birth control, pelvic exams) free of charge (FREE) to teens like yourself. Also, the good thing about planned parenthood is that everything is confidential so even thoough you are a minor, your parents will never find out. Check out
www.plannedparenthood.org for nearby locations in your area if you are interested. Good luck