I have had this problem on and off for 15 years. I have a very damaged neck and pulsitile tinnitus and have had many investigations by ent etc plus brain scans. I am also partially sighted which affects your balance as well. I have been told the dizziness /vertigo is probably due to my neck condition and my eyesight.
I had a bad spinning vertigo attack lasting a few minutes 2 weeks ago and since then I have felt unsteady all the time when walking and any sudden movement like turning or going from sitting ot standing and I get a split second dizzy feeling.
Whenever I get this and it can last months my anxiety goes through the roof as I feel too scared to be on my own or be outside in case the spinning vertigo comes back.
I am sure that my anxiety then makes the dizziness much worse as if I can get a handle on my anxiety the dizziness improves!
Just need a bit of a hand hold today as I am on my own all day today and too scared to go out on my own.