I Have a Strange Fear

it’s to do with stairs I don’t know really how it came about really but for some apparent reason when I get to a certain point or height when walking up alot of stairs my legs get shaky I have panic attack’s and go dizzy. I also have this strange thing with moving stairs and standing on certain things I can manage to stand on like a low sofa or like chairs with lots of foot space that are low down but not things like stools or ladders especially not ladders can’t even go up one step without panicking but have to go places where I have to climb stairs and maybe go on moving stairs so have to stop avoiding it’s not very easy for me at all