"trust your doctor" oh that's a good one. Ive been diagnosed many times with things I didn't have. Doc once told me I had a pelvic hernia, ultrasound said I didn't. Doc once told me I had BBPV, then my psych (at the time) said nope its just anxiety. I was told strep throat when it wasn't. I was told colitis when it was just food poisoning.
Sorry, but docs aren't always right. I know the UK is very politically correct these days, but someone has to speak up and tell the truth lol.
As for me, ive had lightheadedness/dizziness much of my life from anxiety. Its been acting up a lot lately too, but it comes and goes. I can be walking just fine one minute, and the next ill be on a trampoline. Deep inside I firmly believe its anxiety.