Your body is beginning to heal and you are just feeling the effects of your drinking. Everything is getting un-numb, the nerves and everything else don't know how to behave...
It gets better. Spurts of tiredness and spurts of energy and it will even out!
Don't over-do the coffee, eat well (we're usually a bit malnutritioned, even if we ate well, our body wasn't able to absorb the proper nutrients), exercise. Energy drinks are bad, stay away from them.
You'll feel better! Give time time.