Being a failure - that I am so damaged that I'll never succeed at having a normal life because I'm too stupid and scared to try.
One or both of my parents dying and not being able to get to them - they live in another country to me, this is a long standing one, I used to have recurring nightmares about them dying when I was younger.
Being up high - makes me feel very uncomfortable.
Enclosed spaces make me panic.
Good for you trying to face your fears
I used to be terrified of flying, then I did a course, faced the fear, and now it's not so bad, I've even flown by myself! It's very freeing