Help!

Hey, I’m new to all this but I’m freaking out a lil. So me and my boyfriend have never ever had unprotected sex, always used a condom. And he always checks it after (for breakages/leaks) and there never has been anything like that. This month my period is so far 4 days late which it unusual for me. I have 0 symptoms of it coming, and 0 symptoms of pregnancy. Just nothing. I’ve taken 2 pregnancy tests, both negative. However, 3 weeks ago me and my boyfriend moved in together so it’s a major lifestyle change for me. Could this affect my period i.e cause it to be late or even skipped? Am I just being super paranoid? Thanks!