Sue1, I'm also 64! I became post menopause at about 46 and I've been taking HRT ever since apart from a few times when I stopped taking it in order to get baseline hormone blood readings but I'm not going to do that again. I had to increase my Oestrogel dose back up to two pumps earlier this year because my brain stem auras (which are caused by low oestrogen) suddenly kicked off again. The increase in my oestrogen dose together with Verapamil has worked well (by the way, I had to work all this out for myself) but it shows that you sometimes need increase your oestrogen dose even when you are many years post menopause. In my opinion, the last thing you need to do is stop HRT altogether, it doesn't makes sense if there is no particular reason for it.
Unfortunately the menopause never goes away, it's a permanent state of hormonal deprivation unless you replace the hormones like you would if you suddenly stopped producing thyroid hormones. Hot flushes and night sweats come in the first phase of the menopause but other oestrogen related health problems emerge in the second, post menopause phase which is where you are at right now. It's not unusual for symptoms to suddenly get worse post menopause if you are not taking HRT and often we have women on here who say they "sailed through the menopause" but then suddenly take a hit many years post menopause.
Why did you stop taking HRT 7 years ago? Can you restart now?