Oh molly, I'm so sorry you've had such a difficult time lately.
Change is hard. Especially a forced change. Our jobs keep us locked in an environment of our employer's choosing. When they come along and shake that little snow globe we spend a good chunk of hours in every week it's confusing and disorienting.
Keep reminding yourself that you are among the best at what you do. Your boss knows this. If training has not been adequate, ask for clarification. It takes time to learn new skills/procedures.
Everyone stumbles while navigating this road we call life. You are good at what you do. You have made good changes in the past as tim pointed out. You will get past this.
Lean on those who love you. We're always here to give you a boost.
One thing at a time.
*Hugs* ❤