48 yrs old, mirena for 9 mths, insomnia, heart racing - is it buildup of synthetic progestins - any other peri or menopausal ladies in/been through this situation

Hi Ladies,
Following a period of anxiety last year, heavy periods and low iron I decided to get the Mirena inserted. I felt better within a month and so far so good. Since Jan I have symptoms that I thought were related to decreasing oestrogen levels and started with oestrogel and then changed to patches. Twice I have had periods of bad insomnia (body feels electric and heart racing as I try and sleep). Fortunately during the day apart from sleep deprivation I can function. Am starting to get suspicious about Mirena - perhaps build up of synthetic progestin and am wondering what I should do. Thought that maybe it will take time for Oestrogen to kickin but perhaps if progesterone levels are low the oestrogen is just making things worse. Any thoughts/comments/advice/stories much appreciated? Many thanks Tweet