am I just being paranoid?

I have a Lady doctor appointment coming up on the 1st of September so I've been trying to wait it out but I'm so scared because I'm being super paranoid thinking I might be pregnant😣 me and my boyfriend are sexually active and we use condoms but a couple times we got caught up in the heat of the moment and started without one but he never climaxed until we had a condom, but the research I did said it's possible to get pregnant from "presemin " since it can pick up sperm on the way through the male genitalia clearing the pathway for semin. I can't track it by missing my period either because of how irregular i am, sometimes I have it every three weeks or might not have it for three months, ugh so stressful😤