Worried too much I think ?

My period is now 8 days late and I’m sort of freaking out. I had sex with my now ex-boyfriend about 3 and a half weeks ago but we used a condom the whole time because I’m not ready for a baby and obviously that was a good thing because we broke up 2 days after that. Well my period was suppose to come 8 days ago but I’ve been so stressed, my grandpa passed away a week ago today, and with all the breakup drama I’m wondering if maybe that’s what’s delaying it? I don’t feel any different and my periods always been a little irregular but maybe I’m just stressing out over the fact it’s late. I guess my question is, should I be worried or should I just wait and see what happens? 😬