I only experienced depressions after 3-4 weeks of withdrawal.
Not sure what your symptoms are. Reminds me a bit of (pre)diabetic issues, but this could be miles off not knowing your medical history. Are HbA1c and triglycerides in normal range? Blood pressure, weight OK?
A possible mechanism is this: Withdrawal and sleep deprivation increase stress levels (cortisol), which in turn increases insulin and blood glucose. If you are prediabetic (as many of us are, 3/4th of the older population according to studies), some diabetic symptoms might manifest. I usually recommend a low carb/ketogenic diet, but then I'm certainly not neutral in this because I've seen big improvements due to this change in my diet.