To find something to be excited about means also to fear to loose this something. It is a weird feeling. You are sure but also not sure and you don’t know if you can trust your feelings. You are sceptic. You start to think twice or even more. You want to do something but you don’t have the guts. You are afraid of failure. This is an unknown uncomfortable situation.
Well at this point nothing can help you other than the truth. Just be yourself. This is a guaranty of no-wrongs 100%. If you win fate was on your side the whole time. If you fail it wasn’t yours to begin with.
Calm down and be yourself.