Confused about period?

So I usually get my period at average 28 days, sometimes earlier or longer. Therefore, I'm about three days late. I did have unprotected sex but by using the withdrawal method. My only concern is possible precum, but he withdrew way before he ejaculated. This occurred once during my fertile window. Other than that day, I haven't had sex at all. Other reasons that could contribute to it being late are the fact that I was stressing out from a bad ear infection I got during my last period, skipping breakfast ever so often, changing my sleep routine, and worrying about my mom who had surgery. Also, it's been a month since I've gone to the gym and had a healthy diet. Ever since the ear infection, I've skipped the gym. I don't feel like there is anything different about my body that could indicate being pregnant. I'm just so lost and confused, if someone could give me their thoughts it would mean the world right now<3