Yes, I did! I worked in a non-acute area (still bedside nursing, though) for a year, was the charge nurse, and was looked to for help/guidance from new people on the unit, was comfortable with my group, etc, like you mentioned. And, then left to work in a high acuity ICU without ever really starting more than maybe 2 IV's, never placing NGT's, no critical situations.
I felt like a fish out of water, too. It's only natural. You're in a completely new nursing area that requires very different skills/prioritization. It will get better with time once you get to know your co-workers, and you feel comfortable. Expect to feel uncomfortable for a little while, though. Soon enough, you won't recognize your former uncomfortable self