history: I am starting a new job soon. It is quite a step up from my current position, so I'm a little scared that I won't perform well. 
current: I recently got a promotion. It's quite a big step up from my current role, so I'm very nervous that I won't do well in it. 
next: That is great news. I think you just might be nervous. They wouldn't have promoted you if you couldn't do it.