Period!!

my periods due today & I get paranoid very easily. It has not shown up yet & ik it’s early still but I’m getting worried it’s not gonna come. This might sound dumb but I’ve had my bf rub his dick on my vagina but he never went in and he never came. So I can’t be pregnant right? I’ve gotten my period 3 times since that happened so that’s a good sign. A few nights ago I felt nauseous 2 nights in a row (which could be cz I ate too much but I’m getting worried that it was a pregnancy symptom) I’m getting a little anxious/stressed. Last night and today I’ve felt light lower back cramps but no period (yet). What do U guys think?