HELP pregnant or tricking myself?

I had sex last week and a few days ago, we used a condom which didn’t break or tear and he didn’t actually ejaculate. However I am very worried about pregnant - I know that people will say “don’t have sex if you’ll be so worried about it” so you don’t need to comment that 😂 my period is due in two weeks and I don’t really get any PMS symptoms, but I’ve been fancying chocolate and I’ve been quite tired (however i have been at college without breaks for ages so that could be it) and my boobs hurt yesterday when I touched them but only for an hour max. I feel like I’m convincing myself I am out of worry, but I just don’t know 😢 any words of advice? I’m kind of stuck in a rut because I know that stressing will make my period late as well.