I am regularly on a 24-28, and very rarely a 30-day cycle. With that being said, I had unprotected sex on the fourth day of my period... and up to the 7th day after the first day of my period (which was over by the 5th day). On the 9th day and on occassional days after iget a wave of nausea. My breasts usually are sore after I ovulate, but I am not due to ovulate for another 4-6 days and i felt soreness immediately. They are bigger and pretty sore. I also felt dizzy one time. My boyfriend even made a comment that I was glowing on about the 10th day (by the way, he has no idea yet that there is the possiblity that I might be pregnant)! Thank you!