I started off with what you're describing, OP. At the time, I had no idea what it was.
Now I'm working on getting proper medication.
An 'empty' feeling. Fatigue. Problems sleeping. Restlessness. Breaking down whenever I have to make a decision, no matter how small. Loss of interest in everything I enjoyed, which has lead to the loss of the feeling of "meaning" and "direction" my life had, because I keep myself living only to enjoy what I can.
It's going to be awhile before I can get something to fix whatever has gone wrong in my brain, but the fear of pain and risk of failure will keep me from suicide. I wish I could just sleep the days away until my next appointment. Right now it's as if everything I'm doing is only to kill time until then. I can feel every single second passing, and it's not pleasant.