Oh you sound just like I did a few years ago.
I was confused, could not hold a sensible conversation, I was always tired, miserable, crying, hot hot hot all the time & WORRIED SICK about everyone & everything.
I went to my lady doctor & told her I thought I was starting the menopause - she thought I was depressed & gave me a script for Anti Depressants
. I told her that you do not get hot flushes if your depressed, but she would not listen.
I did not want to take AD's so went home, spoke to hubby & I decided that I would go & see a different doc. Now this one listened to me & agreed for me to try HRT for 3 months on the condition that if I was still depressed then I would re-consider AD's, & that was the turning point for me. I came away feeling like a new woman (& I hadn't even taking a pill yet).
Things improved dramatically after that.
I too had the Mirena Coil fitted. The hormone that it provides (Progesterone) is licensed in the UK for 4 years, & by that time the hormone is almost depleted so don't think you are not still getting some benefit after 3 years.
Are you taking any form of the hormone Estrogen to help with your menopausal symptoms? if not it might be worth thinking about. I use to have Climaval along side my coil - it worked very well for me.
I didn't have a close friend to talk to about what I was going through - well I had friends but they weren't having the symptoms as bad as I was having. My very closest friend said "don't let it rule your life" but it blooming well did. The best friend I had were the lovely woman I "met" on here. I did not feel so alone after that & knew that I was not the only poor sod going through this.
Go back & see another doctor, ask for HRT if it is what you feel you would benefit from& if the doc is ok for you to have it. And also remember you are not alone.
Let us know how you get on - & keep posting, & reading as much as you can on here, you will learn so much from it.
Cazi x