Should I be having sex at all? Any life wisdom?

Hey ladies... I know that this topic is somewhat old and an annoyance on this app, but I fell like it would allow me to breathe better if I talked about it. First off, I'm 17 and I'm not on birth control. My BF and I have been sexually active since the beginning of April and I had no fears of becoming pregnant when we first started, but now it has become an issue where I'm mentally unhealthy and all I can do is think about the possibility of being pregnant. I should know that pregnancy is a reality that happens to so many young teens, I really should know better. I keep telling myself Im okay and that Im being responsible and that people do worse things. This feeling is mainly coming from the thought of jeopardizing my future and my boyfriends future, disappointing my entire family, and having a baby at such a young age and possibly not being able to graduate with my class. Now, most would say "hey, well if you know the consequences, why are you even having sex?" But everyone knows that the answer to that is complicated, especially when you're young and you have all these hormones. I'm constantly paranoid of being pregnant even though we use spermicide condoms and he pulls out. I just need to find a way to talk to my parents about birth control, I'm terrified to talk to them about it, I'm scared that I'll disappoint them, they only want what is best for me because they both made the mistake of having me at a young age. I guess the reason I'm typing this is because I just need somewhere to vent. I know that this is a supportive community and I was wondering if anyone can shed some light of wisdom on me? I know the true solution is to abstain until I'm ready to actually have a baby, but I just need some life insight.. I feel kind of alone and guilty, frankly.