Help, I’m a little worried!

I was supposed to start my period yesterday but Auntie Flo hasn’t made her appearance.. 😣 I had my period last month (early by 2 days). The reason I’m worried is I had sexual contact with my boyfriend in December. No deep penetration - if anything he wasn’t even in and he didn’t cum. 😫 But is it possible for me to be pregnant or am I just paranoid??? I don’t know if my insomnia pills are causing a delay but I’m so worried. I’ve heard your period can happen even if you are pregnant plz help!!!