Ok I know this sounds weird but I'm not sure if my period is late because I'm pregnant or stressed.. So the last time I had sexual activity was December 13th and that was maybe like the end of my fertile window according to the app. There was no condom and he didn't cum cause literally he only went in for like a couple seconds (because of no condom). I got my period later that month in December 4 days early and I also got my period again in January (it might have been a few days early I can't remember, but it definitely wasn't late). And now it's February and my period is 5 days late. It felt like my period was gonna come cause I was bloated but then nothing happened. The only reason I'm curious is because I know I've read other people's stories where they still got their period and didn't know they were pregnant til later. But I'm also a senior in college and taking physics which can be stressful and it's midterms now so I'm definitely more stressed than usual. Should I be worried? I don't think so but I haven't missed a period like this in a long time so it's just making me feel weird. On top of that I haven't been able to sleep lately as well and just been tired. Ive also been able to still just eat when I'm not even hungry which is unusual for me. And I felt car sick this past weekend but we were also driving for maybe 4 hours. Thanks for your help.