I had my Mirena inserted yesterday afternoon during a hysteroscopy. The procedure went fine, and other than some cramping (and bleeding - which I knew would happen), last night I was feeling fine.
I woke up this morning with the absolute worst migraine headache I have ever experienced. I believe the nausea and dry heaving I've been experiencing all day are from this huge headache. So far, I am not impressed with Mirena - I wish I had found this website prior to my surgery. Although I'm not entirely sure at this point whether my migraine is due to the Mirena, or the anesthesia from my surgery. My doctor was VERY high on Mirena, and basically talked me into it. I went to her with the intention of having a robotic-assist hysterectomy. I have three children (and don't want any more), and have severely heavy periods - I get anemic every month. She seemed to indicate that she'd like me to try the Mirena first, and if it doesn't work out, then the hysterectomy. With three small kids, I don't think I can withstand the months and months of side affects that I have read on this site.