LATE PERIODS

okay i knowwwww im not the only one that gets late periods but ive been regular for almost 10 months now and i missed my period this month.. i know for a facts im not pregnant because im always protected lol but does anyone get late periods because of stress?? ive been super stressed and i really hope its because of that because my breasts are still tender and my stomach still has little pains so i have my regular pre period sypmtoms.. but no period.