Period Late

Devon

I've been on the pill since March and have been having frequent sex since May. We used extra safe condoms because we're both 18 and don't want to be reckless. Once I stop taking my pill every last Thursday of the month,my period comes on the Sunday usually. It's Monday morning and I'm freaking out that it's not here. I've never missed a day of the pill and only taken the pill late by two hours once.