What should I do

So ladies, my boyfriend and I have been together for over 2 years. A little over a year ago, we had an accident and didn’t use protection. But I didn’t get pregnant. Then the accidents started happening more frequently, and I somehow never got pregnant. Now it’s gotten to the point where we never use protection and he never pulls out. And I’m still not pregnant. Not that i want to be, but now I’m scared that there may be something wrong. Would it be crazy to ask my doctor to run test?? I’m only 20, but if there’s something I’d want to know now before the time comes that I do want a baby and I can’t.