(3 years later, but) I have similar issues and part of the problem is caffeine dependency and (seemingly) issues with caffeine metabolism. Basically if I have too much caffeine several days in a row I start to get stressed and irritable, then I try to cut back and instead feel lethargic and headachey. Unfortunately the last attempt to quit altogether didn’t go well.
(3 years later, but) I have similar issues and part of the problem is caffeine dependency and (seemingly) issues with caffeine metabolism. Basically if I have too much caffeine several days in a row I start to get stressed and irritable, then I try to cut back and instead feel lethargic and headachey. Unfortunately the last attempt to quit altogether didn’t go well.