Only option for me at my workplace is either coffee (undrinkably bitter) or expired tea (tastes like rot). Did not have enough time yesterday to make myself tea for the next day and the shop where I buy energy drinks is closed. I extremely drownsy and my head hurts.
EDIT: Coffee is undrinkable to me, quality or not. The bitterness will just overpower everything.
Headaches and extreme drowsiness suggests caffeine addiction. You may want to consider decreasing your caffeine intake slowly over time. As for working without caffeine, unfortunately, that’s a bit more complicated. I assume that you have difficulties with getting up in the morning, hence the need for caffeine. That might then imply that you are simply a night owl. These things are biologically hardwired into your DNA, and while night-owl-ness is known to change as you age, there’s genuinely nothing that you can do to make yourself into a morning bird.
You can try dimming the lights after sunset, that might help at least a bit with going to sleep/waking up earlier, which might help lower your need for caffeine