hi, i m 22 yr old , my periods always last for 3-4 days. first time i had intercourse ,unprotected sex on 3rd day of periods . Next day after 24 hours, i took unwanted 72 pill than evrything is alright bt after 1 week i had intercors again and on 1 day after taking this intercours started vaginal bleeding light red color, then brownish , which is till now taoday is 3rd days .help me.