Depends on how you feel about your current job? Are you fullfilled and happy? Does it pay your bills? Working in acute care is not the be all end all of care. You do not have to work in a hospital or at the bedside, if you do not really want to, to be considered a nurse and it does not always limit what you can do.
I'll tell you that the skills you thought you lost come back pretty quick, and I am sure you use your critical thinking skills every day but you don't realize it because you are experienced in your position now and things come easier with experience.
I have LPN experience and recently have obtained my RN. I work a few different types of positions and am constantly looking to see if the grass is greener somewhere. What I found is that I do NOT want to work harder, have less job satisfaction, for less money and more stress... ie... no interest in Hospital bedside med/surg type nursing. So I chose visiting nursing for adults, Peds Home Care, and teaching CNA classes. (All while getting my BSN/MSN and a PeriOp Cert)
I have perfected assessments on adults and peds and been able to spot acute changes and adapt to them. I have also worked with vents, trachs, central lines of all types, TPN, feeding pumps, IV antibiotics, CPT (manual and vests), numerous medications, NG tubes, PEG tubes, JG Tubes,straight caths, foley's, complex wound dressings, not to mention numerous braces for one limb or the other. I have even had to draw labs. The kicker... I have 1 patient at a time and get to spend a lot of time with them. All of these things that you get in the hospital... 1/2 the stress :-)
You get my point right? If you want NP there are more than just hospital positions that give you experience. But hey it may just be your fear of the unknown... don't let it stop you from reaching for your dreams!