hi, i m 33 yr old , my periods always last for 3-4 days. first time i had intercourse ,protected sex on 3rd day of periods . Next day after 24 hours, i took unwanted 72 pill and on 5th day after taking pill started less volume vaginal bleeding light red color, then brownish , which is till now. For how many more days will this bleeding happen? Is there any chance of getting pregnant?