need some advice please ladies.

af is due on saturday, this is my 2nd cycle of iui. Started having a few aches yesterday so thought af is on its way for sure... today the same period like aches. I was 100 % sure af was coming. But i normally have sore boobs before af arrives at least a few days before and ive had nothing. Could this mean there still may be a chance for me this month? Any advise will be great thanks ladies xxx