I had Mirena in for two months - and it was hell. I had a non-stop period PMS cocktail, cramps, crazy mood swings, depression, irritability, dizziness, fatigue, etc. My doctor talked me into keeping it in for awhile. I wanted it out after the first week and instead of listening to me she just gave me a prescription for anti-depressants and told me that any side effects from the Mirena would go away eventually. After a few more weeks of torture I stopped listening to her and listened to my body. I've had the Mirena out since Tuesday (08/26/08) and I'm more depressed than I've ever been in my entire life. I don't know if the Mirena crash can happen since I had it in for only 2 months - but I wouldn't doubt it considering how strongly it affected me while I had it in. I had a baby in May and I think the Mirena messed with hormone levels that were already fluctuating post partum anyway. I'm hoping to achieve homeostasis before I go messing with my body anymore. I wonder if it would've been a better option to have had it put in much MUCH later after delivering a baby. Every woman is different and makes her own choices about which birth control works for her, but Mirena was hell for me and that's what I will be telling every woman I know.