Think about this way: you've been rewarding you're brain through alcohol for a long time. Then on the drop of a hat you've taken that reward system away....completely. Nobody is going to be happy with that, your brain included. It takes some time for it to re-route and re-wire itself to find alternative sources of pleasure. They do emerge, slowly, and out of the fog. You just have to be patient. Easier said then done, I know. But it's an entirely new way of living that your brain is figuring out. Takes some getting used to.
I was also in pretty bad shape for the first month. Lots of peaks and valleys since then too but nothing as bad as those first thirty days. Just try to remind yourself that better days are on the horizon.