Need for Perfection

I really get down on myself if I feel I can not do something perfect. I don't think I am going to be able to work at different clinics because everything is done differently at each clinic. I must feel in total control and I don't. I am trying to pick up a few hours to supplement my disability. I used to be so good at my job, now doing any type of work is a struggle. How can so much be taken and you still have any confidence. I hate the shaking part. Just venting after a frustrating day.