I'll second what purpleknight said.
I have experienced bouts of low mood, low motivation, feeling unfocused, feeling a sense of dread, anxiety, sleep problems, energy drainage, sexual issues, stress, and general malaise. All of these come and go, not constant. Some of them were there with the alcohol, some of them feel new. Maybe these are all just elements of being human that I previously 'handled' by drinking.
Maybe these are all signs of some physical condition and I should consult a doctor.
Maybe I could use therapy again... haven't been to a counselor in a long while.
Maybe it's a little of all of the above, combined with the rebound effect of not drinking and my body trying to adjust to sobriety after a long, long, long time of abuse.
Whatever the case.... I'd say you're not alone. You might consider seeing a counselor or going to a doctor if it is getting disruptive. I do think that if you take the right steps to address your emotions, mental processes and physical well-being.... it will improve with time.