My flashes stopped about 6 or 7 years post meno, but I was also on a med that caused them and they didn't start for at least a year after my last period.
My libido is the same. The only issue I had was severe dryness, but the desire was still there. That coincided with the time I started riding 1,000 + miles a year and man, the combination was quite painful. I've had an E-string since 2005. It gives a tiny tiny dose of local estrogen to help that issue. My doctor told me that it is even approved for post cancer patients. She also told me "use it or lose it."