I worked in finance and accounting my entire working life, about 24 years, and one day while trying to balance a spread sheet, I realized I just didn't give a flying flip where the missing ten cents was.
I quit my accounting job and took a job in the education department at the place I now work, a maritime-themed science center, and spent my work days blowing up hydrogen balloons to explain combustion, teaching 4th graders about the importance of watersheds, and creating educational material for the local schools. This led to me becoming the webmaster for this science-center and I have not regretted one second of it. Plus, I get to go to work in shorts and tennis shoes.
Sometimes, you have to take that leap of faith to get out of a rut and find employment doing something you truly love.
Best wishes to you on your journey.