First of all, the Male penis releases what is called pre-ejaculate before he actually ejaculates or even if he doesn't ejaculate at all. This CAN still get you pregnant. If you think you are mature enough to be having sex, then be mature enough to get yourself on birth control or use condoms. Babies are no joke, I am 30 and just had my first child and it's hard, I couldn't imagine having done this as a teenager. Another thing that is very real is HERPES and other STDS. Just please educate yourself and do your future self a favor and please listen to the advice I just gave you. Good luck!
you should probably take some pregnancy pills just in case, because when released the penis has millions of sperm and all it takes is one to cause a baby.