Fear of Failure?

I had a sleepless night last night, my insomnia comes and goes still, and while lying wide awake at 2:48 am, scratching Rose's ear, I started to think again about where I want to be in 10 years.

I think I know. At least, I think I know what I would like to try. I think I know what I enjoy at heart. But taking the next step... I am afraid. I'm afraid I won't be successful. I'm afraid I'll cost my husband and I more money than we can afford for the education. I'm afraid that if I do get there, I'll find out it isn't what I thought it was or what fits me after all. When I think about it, I get so scared I feel paralyzed. I feel confused and unsure and full of doubt.

What do you do when you feel scared of failing?

What would you try, if you knew you couldn't fail?

I'm adding a picture of a happy panda to balance out this post :)