You very well could have come down with something. A visit to the doctor would confirm this.
Originally Posted by
Katzen 
... even after being mostly sober so long is it possibly still withdrawals?
Katzen, you haven't been sober that long, seeing how you drank just days ago. The relapse took you back to ground zero. I don't mean philosophically, nor do I discount your sober time. I mean physically. You drank. For the alcoholic, this means withdrawals. It's called Kindling. Look it up.