I've been on the Nuvaring for two years. I put this ring in two weeks late but it always takes about 5 days for my period to come and it lasts for around 5 days so my one week off is never exact. I forgot to put my ring back in after sex on Saturday night I believe and it's Wednesday. I realized I forgot to put it back in when I went to wipe and there was blood. I don't know if it's spotting or my period, but I was pmsing on Monday and yesterday. Should I take plan b? Or will it be too late anyway? Or is this period going to help flush out any sperm etc?