Anxiety/ Pregnancy Scare?

Just on the 28th/29th of December, a guy and I had sex 3 times total (2 at night, 1 in the morning). We were protected with a condom every time we had sex and he urinated and cleaned himself off after each time. The first 2 times during the night, he did finish with his condom on and there weren't any problems/complications or else he would have voiced them. The morning after, he came nowhere close to finishing with the condom. We had to stop and finish him off manually, taking another 10-15 minutes. So, it's more than obvious that he never ejaculated within me (and with the condom on). 

It's the 9th of January now, and I'm having a humongous pregnancy scare. Perhaps it's my PMS since this past Friday, but I've been bloating just a little, every now and then. So, therefore, I'm a little more gaseous. I had a stomach bug and diarrhea last Thursday, but I was able to figure out it was from something that I ate. However, on top of that - I think I may have an off/on infection because my vagina felt itchy - it wasn't too uncomfortable, but it's okay now. When I peed, it slightly stung, but now it's okay again. I'm not sure if it'll return. I don't know whether it's cramps or not, but when I have anxiety, my stomach would hurt. I think it's slight cramps, which is freaking me out so much right now. Otherwise, I don't feel "pregnant" because I haven't had any other "symptoms". I peed a little more frequently, but not enough to label it alarming - probably because of my guessed infection. 

Maybe it's just my paranoia that is getting the better of me? I'm due for my period at the end of this week or the beginning of next week, but I'm so scared of the possibility. it would have been 12 days and counting since I have had sex, and my last period started on December 14th and ended on the 18th - 5 days. My cycle is somewhat irregular because it varies between 30-34 days. I'm so scared right now, but we were safe (because I'm not on the pill).

I just told my mother I was sexually active and it was devastating to her and my family because they quite hate the person I had sex with (he and I have known each other for 6 years). Needless to say, it was a very bad night and nothing was solved. Now, my parents are probably just rejecting the possibility of me being pregnant just because they are so scared. So, i probably won't have a trip to the gynecologist and my doctor until late January. 

What happens if I have a missed period this week? I am 18, but I don't have a car. Is my anxiety just way too over the top? Besides for those little things, I feel completely fine. Or else, maybe it's too early for symptoms to show?! I'm literally on the verge of a meltdown every day, help me, please?