I can't tell you how many years I went to the doctor about my palpitations, and facial flushing. I went to see a cardiologist and thankfully he noticed the facial flushing (it never occurred in front of any other doctor). He then said he wanted to run some extra heart tests although he thought it was unlikely I'd have the rare condition he wanted to rule out. That freaked me out even more because I thought I WOULD have the rare condition. I heard him ask someone outside for the 'catecholamine test.' I got quite anxious and he said I won't have this condition, he's just checking because I report palpitations and facial flushing. My GP then told me not to have the test. He said the flushing was anxiety.
Long story short, I didn't do that test, the cardiologist was ok about it as he thought it would be extremely unlikely anyway and the scan was normal.
I then spoke to a young female doctor about vaginal symptoms, completely unrelated to heart, she said it's all peri menopause, the whole lot, including any anxiety, etc and put me on Evorel Sequi. Flushing gone, palpitations mostly gone unless I skip a meal, anxiety gone because palpitations gone, lol.
Anyway long winded way of saying there'll be a lot of doctors telling you it's anxiety. There'll be others like the cardiologist I saw that want to listen to you but don't know about menopause, lol.*
What if you went to see a younger female doctor (I found the older female doctors still tended to dismiss menopause, not wanting to generalise, but it seemed that way at my surgery) just to get a new perspective. Tell them from the get go that you want to look at this issue from a hormonal perspective ONLY until all possible approaches have been tried.
I just think your hormones have got to be balanced before you can even begin looking at other things. I wish you all the best.
(* not addressed at you Unicorn, but quick note about this for any other readers, any heart symptoms should always be checked by a doctor and I would always listen to a cardiologist in particular, they know their stuff, and I made sure he was ok with me not running one test and this was after a scan had been done that he was pleased with)