light brown discharge (confused)

so february 13th was supposed to be my first day of ovulation according to eve, but my period can be irregular so it may not have started yet. me and my boyfriend had sex for about 3 minutes that day and we made very sure that there was no precum. we decided to stop halfway and he didn’t finish inside of me at all. my boyfriend doesn’t always have precum when we have sex so i don’t think that was really a risk. a week later, i see a very small amount of creamy, light brown discharge. my ovulation was supposed to end on february 19th, but i don’t know if that had anything to do with it. the light brown discharge is gone now, but i just wanna make sure it’s not because i’m pregnant (most likely). am i just being over dramatic and paraniod or do i actually have something to stress about?