Can someone please help me!? Late on period!!!

Hey guys, I know it's a little early to be freaking out but I am 2 days late for my period. I don't believe there is any chance that I could be pregnant because I'm on birth control and my boyfriend and I always use protection on top of that. (And there's like no way I could get a test so.. .)Do you think the "oh no what if!?" Stress could be making it late?? I mean I'm pretty sure it's coming because I broke out pretty bad and I'm a little irritable but.. Any thoughts? Thank you.