Bluessinger, the very heavy periods may be due to the fact that in meno and peri-meno, women are not producing progesterone any more. You can become estrogen dominant and have heavy periods; and develop uterine fibroids (fibroids are one cause of hyper-heavy periods).
With the skin beginning to thin, that is from lack of testosterone, likely. When a women loses her normal progesterone, she also loses testosterone---partly because the female body converts a small amount of that monthly progesterone to testosterone. It is testosterone that gives elasticity and firmness to skin and muscles.
I am not a doctor, but a post-meno female speaking from experience and a lot reading and research on my own. If you are so inclined, you may want to consider speaking with a gynecologist about bio-identical hormone replacement. I have gone that route, and found that it works well.
Just a word about hot flashes: It seems to happen more frequently to women who have a tendency to adrenal burnout. Adrenals are directly linked to the pituitary---and weak adrenals throw everything else off (the working feed-back loop between pituitary, adrenals and thyroid). It's different with each woman---some are under tremendous, long-term stress which will weaken your adrenals if the stress is not addressed. Other women thrive on stress....and may never have hot flashes. Again, personal experience: I had unspeakable stress 10 years ago which made me ill---and then a year's worth of hotflashes that would take down a rhinocerous!