I just had my first child almost 3 months ago, and I wanted to get on Yaz because I heard that helped with depression and heavy periods, which I experienced before I had my baby. My Dr said that I couldn't go on Yaz because I was breastfeeding, but that Mirena helped with those things and lasted for five years, and explained the other conveniences of it. So I had it put in at the end of November. I took 800 mg of ibuprofen on the advice of the doctor before I went in, and the insertion was hardly painful at all. I experienced some light cramping for about 10 minutes, and then some stronger cramping that night after the pain relievers had worn off. I had light spotting for a week and then my period started, a full blown period, heavy flow and mood swings, not quite as bad cramping as usual, but enough to make me nauseous once or twice. Today is the 10th day of my period. This morning I woke suddenly with a severe pain in my lower right abdomen, that pierced through to my back and radiated down my thigh and leg. I immediately took 5 ibuprofen (more than I took before the insertion), and the pain wore off after approx. 30 minutes, (I wasn't exactly watching the clock, I was busy writhing in pain on the bed and crying). I have also had several mood swings in the last few weeks but I thought it had to do with my fiance and the baby, we have been fighting anyway. So later when I got up I searched the Internet for side effects I found this site and read all of the posts, and now I am frightened that I will develop more side effects. I just hope I don't start imagining things, the mind is very powerful. Let's all wish each other luck with this. I am starting to think maybe I should get this thing removed and just use the pill or condoms. Good luck to us all.