No PMS?

My period is supposed to start soon but I haven't gotten any PMS symptoms like I usually do the week before. My last period was early this month, cutting into October 31st. I don't know if I'll start late because of that or if I'm pregnant. Last week my boyfriend and I didn't use protection but he pulled out. I'm still worried and have been anxiously waiting my periods arrival (for the first time.) If anyone has any advice , I'd be grateful. Thank you