Yes! Me
I just returned to work after being a SAHM for four years...same state, different city, different hospital (or course!). A lot of what you are saying sounds sooooo familiar! I mainly only had one preceptor...except for the last three weeks of my orientation; she went on maternity leave. In those three weeks I had three different ones and it was rough. They just didn't know where I was at...even though we reviewed this before heading to patient care. Boy, can I relate to your comment "which I only was able to obtain when I had a preceptor who gave me some breathing room!" I know they meant well, but there were some preceptors that really expected their way of doing things from me and didn't have any respect of any other way; not my original precetor, btw! I can tell you that things are *much* better now that I am "solo."
Maybe I got lucky because everyone in the unit is well aware that I am returning from a four year hiatus and are very supportive. Even my boss. We have a clinical ladder advancement procedure and he mentioned that he was placing me at my level because he knew that there would be a lot of reenforcement. I agreed of course!
Like you, there were some things that came back "naturally." I found it very odd that I was able to remember the equation to obtaining a CO...even though I never had to figure it out "manually." I did have to "shoot" CO's, but at my new job they have continuous CO monitors

Anyway, just one thing that I found odd to have remembered after being away, what seemed to me, like forever!
Try to remain positive and take the criticism as constructive...although I know it can be difficult. Best wishes!