Weird period?! Help please!!?

periods can ABSOLTULY change from extreme amounts of stress and aniexty. i am depressed and before i was put on medicine my period was so off. it was so off it would come four months late and when it came it was only 3 or 4 days and there was barely any blood. i would keep an eye on the period with unprotected sex, very risky but if you miss your next period go to your doctor and see if you can get an accurate pregnacy test. just keep notes on everything that goes on in case there is sometihng wrong. it may just be from extreme stress.