Well, TWB, it doesn't hurt to be seen by a doctor about how you are feeling. Clinical depression has a number of indicators, including how long the symptoms are present and a variety of other markers. Don't feel afraid to see somebody about it if this continues, if it becomes worse, becoming something that you have beyond just a few hours in a day or plagues you at all times.
Are you doing anything else aside from not drinking to further your recovery? The feelings of disinterest in things is pretty common. As has been suggested, altering your routine can be a helpful strategy, especially if you can include some human contact in the pursuit(s). There may be inertia of "everything sucks right now" that you may have to overcome with commitment to yourself and/or to others.