Thanks everyone. My thyroid is fine I have just had it tested and was exact same results as 5 months ago so its stable at least
As for anxiety - I was not sure if it was just me getting into a panic because I felt so peculiar or anxiety/flush making me feel peculair?!
I had another one yesterday where I suddenly felt lightheaded and waffy and then the overwhelming heat but no sweating but I thought its just a flush and will pass so wasnt as anxious and it did pass without me falling to the floor.
I do find that I can get hot flush before bowel movements as well although maybe it the hot flush provoking the bm
What makes me anxious is not knowing when its going to happen or how lightheaded I will feel - chicken and egg!