This past sunday my boyfriend and I had sex for the first time. Idk if I am just freaking out bcuz we did it, ?

But I have been doing a good job of freaking myself out. Example: A couple of weeks before we had sex, we were practicing how to put on a condom. We tried but it didn't exactly work because it was inside out. We decided to try another time. We had sex with tht same condom this past Sunday bcuz it was kept in the wrapper, in a cool place, AND still LUBRICATED. I am now afraid bcuz I read an article tht you are not to reuse condoms. Althoughit did not POP (we ran tests to make sure) I am afraid tht some potential semen from when we first tried it on could have gone inside me bcuz it was INSIDE OUT WHEN WE FIRST TRIED IT ON FOR A PRACTICE! Idk if its just me, but I am really starting to freak myself out. My period is due in a few days and I'm afraid it won't come! Someone please give me some advice! I am 18 yrs old. MATURE ANSWERS ONLY WOULD BE APPRECIATED!!!