I can understand that - I worked hard to get my degree too, but I too can't do the job I trained so hard for, but actually I know that atm, I'm doing what I can to help others and yet it's something that I can fit around my own life and illnesses.... Maybe you have to focus on the "right here, right now" this is more than enough for you to be doing... but it doesn't mean it'll be forever. Why push yourself to do more when you are finding your current position difficult....