took my pill late

Hey guys, so I was super busy and wasn't able to take my pill. I was at work. I took it 2 and a half hours late. I've always even on time and have never missed one. What exactly will happen? I have unprotected sex and I'm just curious if I should wait to have sex or will I be fine? It won't throw off my period right? Lol
I know sounds crazy, but I've only been on BC for a little over a month.