Hello Sho65,
I am also fairly new to the forum, but wanted to say hi.
I'm a year younger than you, but went through lots of your symptoms last year, and seem to be a bit ahead of you in the process. I'm sorry I can't advise regarding the anxiety and palpitations, as those weren't my symptoms, but I can share my experience of hot flushes. I had had night sweats for a few years, but no hot flushes during the day until the summer of '16. As I went into a stretch with no period for 3 months (following a few months of having them very close together) the hot flushes started during the day. I'm a secondary teacher, and having hot flushes in the classroom was a nightmare! My flushes just got worse and worse, until I was having them hourly, 24 hours a day. The result was no sleep for months, which was awful. This was what eventually led to me trying hrt. My story might not be in any way reflective of what will happen to you though. I've known women who never had a huge problem with flushes.
I'm sure someone else will be along who can advise you re the anxiety, but in the meantime I hope you find some more answers to your questions.
This is such a fantastic resource, and I'm sure you will find help working your way through this particular journey we face.