I;ve been in situation myself as of late not knowing whether or not I am going too step foot on truck again due to medical issues. I definitely understand what you are saying,and am hoping to hell I get cleared back to work myself.
I am reasonably sure that it's a question that, forced medically or not, everyone in this profession faces at some point or other.All we can do to answer that question is take the time to reason it out, and not force the issue. If we go back before medically cleared, are we a help or a danger to the patient? Same question if someone is completely burned out and they are not sure if they want to do this job anymore. This job is a passion for most, and time away from our passion drives us nuts.
All that being said, if you are not medically cleared, as much as it might hurt, at least having a fall back which you can feel good about is a good thing.
I guess what I'm saying is this, everyone ponders the how long we can do this profession. Some people answer the question themselves, and others have it answered for them. Until you find out what your answer is, take it one day at a time, and let things happen as they do. It's what I'm doing.
Hope this helps
Thrutheashes