My period cycle was around 28 or 29 days. Since last 4 months ago, my period cycle was start changing to 36 or 37 days. In these few month, I stressed out so many things such as worry about my bf lost his licence n also many problems between us, plus my financial, my study, my jobs ad well... so is it the reason cause to my period come late???.. is there any problem to my ultra... please help;(( thank you