Hungry!!!

Okay so all I can think about is food... 😳 My AF is due 7th Feb but hoping for a no show and to be pregnant instead. Over the past couple days I have been SO hungry! But I've been eating 3 meals a day with the occasional snacks but I'm still starving! In the past week I've had a serious cravings for nachos and chocolate, which is a bit strange for me. Has this happened to anyone else? Is this a sign of pregnancy?