Do you smoke as well? I'm just an occasional smoker now, but if I have a couple of ciders (that's all I can manage these days!) then I feel fine next day. But if I have say four smokes with those two ciders I will feel like absolute crap the next day, not sick but just achey and exhausted as well as having blocked sinuses.
Yes I reckon it is a fatigue thing too, first thing I noticed when I first quit the smokes and alcohol at the same time - couldn't enjoy one without craving the other- was that I was able to sleep right through the night for the first time in decades.