* no rude comments please *

i had an irregular period last friday it started was bright red then saturday turned brownish and went away till monday on monday it started out bright red but stayed bright red and very heavy till friday , on friday saturday and sunday. i had unprotected sex the day my period was finished and up to 3 days after it was gone . what are my chances of getting pregnant ? i know you cant know forsure because im unsure of my cycle . im pretty sure i have about a 21 day cycle , this past month has been the only time ive had an irregular period . i know its hard to tell but im just looking for some ideas :-) thanks