Period Problems

Okay, so, I just started having my periods again three months ago and I haven't had it yet this month even though I'm showing all the signs. I did just recently move out of my moms to be with my boyfriend. I'm not sure if it hasn't come up yet because Im stressing a little or what. I don't know what to think right now. I have gone two years without a period and I know I'm not pregnant because my boo and I haven't had sex yet. Any answers?