Many thanks for your replys on this, I hope it is the same sensation - it really is scary and unsettling.
I have woken up this morning feeling sick and lightheaded for most of the day now - not sure what it is.
If I did have a brain tumour would I have nausea and dizziness together ot would they each happen separately - I still can't get the thought out of my mind that something is wrong, fed up of it, I am getting really really down about it and wish the doctors would push me for a test, maybe its because I have seen different doctors!!??
Beta blockers were working, now seemed to have stopped - so is it a brain tumour????
So fed up and scared of being scared.