Following passion is a good thing. But it's simple to say, not as somple to do - you still have to make your living. Kinda "catch 22"... I felt same way when I graduated college and found myself thinking about it more and more. Once it got all over me - I knew I had to make my choice.
It's hard - but if you're seriously thinking about turning your life to another path, which I guess you are, take a break for a few days and think deep. But if you make the approach to change your lifestyle, get ready to work twice as much to succeed for real.