Stressing

I am late for my Period. However I am in the middle of collage exams and super stressed and have gotten little to no sleep. Also this month (after having sex and haven’t had it since) I messed up my birth control, accidentally taking 2 in one day and then losing it and ending my pack 3 days early. I am now 4 days late. I am sure I am just freaking out however if anyone could/ would give advice or assurance it would be great.—— note we also use condoms