pregnant or not?

Amethyst

Hey y'all, So I've had this feeling that I'm pregnant but I'm not sure cause I have been having alot of stress lately. But from apps and such or the internet my period was on may 5th based on when I started to spot on the 28th of may. I had sex on the 20th so I was ovulating around that time and I didn't know it. My period does not act like this, spotting or light for 2 days and only lasting 2 days. My cycle is normal never irrialger. But I took a pregnancy test after the bleeding it was negative. The condom didn't break either but I'm feeling sick, my moods are bad, I feel bloated, and I may or may not have missed my period today is supposed to be my last day of my period. I'm not 100% sure when my period or comes cause I never paid attention to when my periods come until now I'm just using an app. Anyways could I be pregnant or is it just stress? I'm taking one more pregnancy test sometime this week since I'm told I should take one a week after the bleeding and take one after my missed period.