My LMP was Nov 6. I got a positive OPK on the 21st. Had sex Dec 1st. Started a light period Dec 4th that didn't even last past the morning of the 5th and had another positive OPK the evening of the 5th. And I have been nauseous with swelling and sore breasts, bloating and just feeling more tired every day. What the heck? Has anyone had anything similar?