I developed kind of a mind game about this from skating. Sometimes, you just have to decide that you are going to lock the trick no matter what and not care what happens after that. Sometimes you have to eat shit to get over your fear. If I was scared to hit a rail sometimes I needed a good bail to be like, whelp- that's the worst thing that's going to happen. Head games are difficult though, you get into patterns and develop fear of doing things differently. Everyone struggles with it at whatever level, good luck dude.