Has anyone else had this happen?

I had the Iud put in on June26,2007 I had cramping a lot and a lot of bleeding, but not heavy I would bleed one day not the next and then again the next for the first two months, then in september I had a small period for about 3 days, then last month when I started bleeding (Which was hardly anything and it was brown) I got this horrible odor, I used some monastat thinking maybe I had a yeast infection. It went away for a couple of weeks and now it is back. I don't get headaches or dizzyness or moody like I have read alot about on this site. Thank you!