Period and Sex

I’m losing my virginity for the first time this weekend and i was supposed to get my period today. I didn’t yet but I’ve had the PMS symptoms since last week. My period usually only lasts 3-4 days and i think i stressed myself out so much because of losing my virginity and stuff it delayed my period a bit. I don’t know what to do now because my luck it comes when we’re about to do it.