I am not an expert by any means, but I'll throw this out there ~ Up until yesterday I was a wine drinker. To curb some of the cravings of sobriety, I'm slowly weaning myself off sugar. Low carb diet.
Along about day 3 (tomorrow), I'm totally expecting a major headache. Sugar crash.
Alcohol and sugar seem to be very related.
Drink lots of water and just know it passes after a day or two.