Had my Mirena inserted in July 09. Slightly painful to insert but nothing I couldn't handle. Serious cramps the next day...labor pains. Bled for 13 days after. Have never had a period since. I feel cramping for 3 days of the month and that's it. I too have gained weight, about 10lbs. My nipples are extremely sensitive and I have neck acne. I have been on antidepressants since March so have not noticed more anxiety. I do get the symptoms of yeast infections every month. Very itchy. It goes away on its own. I came on this sight to see if anyone else thought they were pregnant with this inserted. I guess the breast sens just comes with it! lovely.