I'm in the same situation, although I just turned 48 and my periods are off and on. Have you had a hormone test? I've heard of them, but haven't had one yet..guess I don't need one to tell me that the big M is around the corner. LOL For my moods I've been using Wild Yam cream with good success, you might want to check your local health food store for it, use as directed.
I won't do any HRT or use soy products because cancer is very prevelent in my immediate family, I'll get through it w/out that stuff. I think you're doing really well with your supplements and exercise. You may want to consider your Omega 3s and 6s and up your intake a bit w/those, can be done w/food or supplements. If you decided to take flaxseed, either get seeds and grind them or take the oil, the pills are a waste of money for the amount you have to take. Also consider adding coconut oil to your diet, its amazing in the health benefits it offers.
Stretch too, keep limber and flexible. I think getting older and going into a new phase of life is exciting and I can't wait til I get fully into it! Congrats to you too!