Initial withdrawal symptoms are typically over within a week or so, but in certain cases, a variety of symptoms — including anhedonia — can persist and recur long after the acute withdrawal period is past. These symptoms are often loosely grouped as PAWS — Post-Acute Withdrawal Syndrome.
In the case of anhedonia, some brains don’t bounce back as quickly as others from having their pleasure centers repeatedly bombarded with alcohol over a period of years. It took time for your brain to get into this condition, and it may take time to get out of it, too.
Whether the cause of your anhedonia can be ascribed to PAWS or not, the solution is the same. As others have suggested, get out and explore new interests and activities, even if you don’t feel particularly inspired to. The inspiration should come with time. Right thinking follows right action, as they say.