I went through this a couple of years ago. I got out of grad school, and started my postdoc. For the previous 8 years (undergrad + grad school), I had a well defined track: grad school -> PhD -> postdoc -> research professor -> tenure. During my postdoc, I realized I didn't like a great deal of the day to day work of academia: teaching, writing papers, applying for grants, hyping your work. The job I succeeded in getting was not the job I thought it was. I went through the exact stage of uncertainty you are describing.

Then I decided to forget about a long term plan and focus on day to day living. I took up Eskrima (Filipino martial arts), something I wanted to do for a long time. I broke up with my long term girlfriend and decided to leave the academic track. I still don't know where I want to live or what I want to be doing (in the long term), but I don't need to know that.

Yesterday I went for a run (my first this year). I found a new job (trader at a hedge fund) which I enjoy day to day. Most tuesday nights I fight with sticks. I drink more beer, am in better physical shape and am simply happier. I don't have the answers to your big questions (where to live, what to do), but I don't need answers.

So, my suggestion: don't worry about the future, focus on things right now.