After I had my son I got an IUd, since then my periods have been fairly on time, but heavy and lasting 6 to 8 days. I also spot very lightly during ovulation. All which my dr said was normal with my IUd when I went last.

But the past couple of months I have been getting my period a few days early, and after lasting 7 to 8 days it will go away only to come back a week later, not as heavy, but definitely not spotting. It will last for about 3 or 4 days. Then I will get it again, a few days early. So pretty much I have my period, along with all symptoms (mood swings, cramps, fatigue, ect) 2 weeks out of the month!

Anyone know what can cause this??