Hello :-)
I totally empathise!
I'm also 51, and about 3 years ago felt like I'd fallen through a trapdoor into hell. I was really anxious and depressed, tired, had painful hips, insomnia, hot flushes at night, dry itchy skin, and my waist thickened. It was some months before I discovered it was peri-menopause.
I am taking a cocktail of transdermal oestrogen (gel, because patches are currently had to get hold of), micronised progesterone, testosterone and in the autumn and winter, I also take an antidepressant (fluoxetine).
On top of that I do quite a bit of exercise, don't drink much alcohol, and I try to get outside for natural daylight for some time every day.
I feel much better than I did, with most symptoms under control. I still don't feel quite myself though, as I get tired more quickly than I used to.
I hope that helps a bit?