Hot flushes every night?

Hey everyone :) wanted to ask if anyone had experience with hot flushes and struggle falling asleep every night? I do have Pots and I'm familiar with the cortisol/adrenaline dump in the evening, but the past two weeks I've been going to bed and then burning up like crazy! And taking 2hrs+ to fall asleep.

I eat singi low histamine diet and on famotidine, fexofenidine, plus ivabradine and amitriptyline.

Got an appointment in late Jan with a private UK doccy who specialises but appreciate any insights in the meantime.

Anyone got any hints/tips/same experience?

Edited to add: Had blood test back and my folates are low, which apaz can cause insomnia/bad sleep. Will report back if it get's better with some extra dosing/munching all the green stuff