[alextingle]

Try cutting down your caffeine really slowly. I did it by gradually cutting caffeinated coffee with slightly more decaff, over months. Eventually I was 100% decaff. Never had any withdrawal (the headaches, and energy slumps you mention).

And now I no longer have any of the bad symptoms caffeine was giving me: nervous tick, wildly fluctuating energy levels, random extreme emotions.

Back when I was younger, caffeine had none of those bad effects on me. But as I grew older, they started to ramp up. Because coffee was such a constant in my life, it took me many years to realise the cause.