Read asap please

Im 15. My boyfriend and I had protected sex about three weeks ago. Not looking for judgement, just help please!!

So like I said we had protected sex. There was precum in the tip. Later he pulled out and it was gone. We checked for tears and holes, there wasn't any. Could the precum have slid around on the sides?

Now its three weeks later. Im having horrible pain in my lower left belly. We're thinking its ovarian cysts. I haven't had pregnancy symptoms and I got my regular period on the planned date two days after sex.

Im just scared that the pain is not cysts, but maybe a pregnancy? Haven't taken a test, but I'm going to the doctor in two days. Help!! Tell me what you think?!