Y'all

I'm supposed to get my cast off on the 17th and I'm super excited but also nervous because I'm not sure if my arm is healed enough for me to be able to use it as much as I used to. Is it normal to feel nervous about getting a cast taken off? I feel like I'm just extra nervous because of how badly it was broken and I'm just not convinced it's fully healed even though my doctor is saying it is.