Have had the Mirena for a year due to needing some hormone therap...

Have had the Mirena for a year due to needing some hormone therapy during menopause.I am 54yrs old and had my last period over 2 yrs ago-look physically like I am in my 30's. Had a breast reduction and weight reduction surgery over 10yrs ago VERY successfully lost 10# off my chest and 168# off of my body. SINCE having the Mirena I have gained over 30# and gained 2 cup sizes in my breasts! HELP!!! I have been treated by my regular doctor for mood swings with WellbutrinSR, Lexapro, Lamictal, Topamax and others-nothing has worked more than to ease some of the edge. I have gone from a size 2 to a size 10-12 in 9 months and am desperate for an answer! I feel as if all of the previous progress I had made with the weight reduction and breast reduction is all being undermined! I had a tummy tuck last September 08 and I swear my stomach was flatter before I had the surgery! I look pregnant! The surgeons have done a CT scan and can find nothing to indicate the surgery went bad. I don't know what to do as my OB-GYN tells me that "this IUD" is my best bet for hormone therapy and that it is ABSOLUTELY NOT the cause for the weight gain or breasts. Has anyone else "my age/menopausal" experienced this? Most of what I have read has been very helpful BUT all but a few are pre-menopausal and way younger. PLEASE let me know your thoughts!!