My period is late.. uh oh.

I know I'm really dumb for this, but me and my boyfriend have condomless sex a lot --- nor am I on birth control. My period is supposed to happen today, but so far nothing. Now I'm worried. 
The only period symptoms I've been having are having the urge to eat a lot, fatigue, and being emotional/irritable, which can also be pregnancy related symptoms too. I'm an idiot for not using any contraceptive methods, but every time we did it, it was in the moment. 
Any advice for me to stay less anxious?