What is your diet like? Are you constipated? How is your sleep?
I recommend considering acupuncture and/or trying other supplements. Can you tolerate liver cleansing herbs?
I think you are simply adjusting from a high energy diet to a low energy diet. If you consumed foods with certain bad carbs or sugar, you likely would feel a bunch better energy-wise.
Chamomile tea is something that I drink instead of coffee. It is antifungal and promotes digestion also. If you steep it longer than 7 minutes then it gives you energy vs. making you sleepy.
Certain foods give you a lot of energy. Rutabega, pumpkin, coconut oil, flax, teff, etc. give you a ton of healthy energy. It could come down to you not developing a good enough diet, atleast right now.