Hello Mutti60,
I am 56, had last period at 52 and started HRT at 55. I've been taking it now for about 15 months, mainly for memory issues and hot flushes, and my memory problems have now all but gone. Daytime hot flushes disappeared very soon after starting HRT but night time ones persisted until a couple of months ago. Now I barely notice them either. It was all a gradual process with good times and bad times, especially re memory, but now I am so much better. I knew nothing about HRT either at the beginning but the doctor was great and explained it all. I hope you find something that works for you.