I’m currently using the nuva ring and yesterday was to be the day I take it out and start my week on my period for the month...my boyfriend and I have had sex during “the week/period week” ...sometimes he pulls out,sometimes he forgets. Today he forgot to. Is it weird that yesterday (the day I was to start my period) I didn’t menstruate at all ,not today?....it happened the last two months where my period didn’t start on the day it was supposed to. My periods have been starting as late as 3-5 days in my period week?