You're looking at a month before your energy returns. This depends heavily on age, physical ability, how long you used etc. But 30-40 days is a good average.
You have to understand that most of the weakness comes from both your inactivity when using and mostly your brain recovering. It takes some time for those energy creating endorphins to start pumping out again.
Right now your brain is in this in-between place where it's just starting to make it's own chemicals again. It doesn't help when your brain is exaggerating the most minor aches and pains 20 fold.
This takes time but it will happen. I know that the sucky part of the whole thing is that the first 6 weeks are the worse because your brain isn't producing all the chemicals it needs to like it was before you started. TIme flies so slow during this period too. It always does when you feel down. Ever notice that time flies when you were using?
WE ARE NOT HUMAN BEINGS GOING THROUGH A
TEMPORARY SPIRITUAL EXPERIENCE.
WE ARE SPIRITUAL BEINGS GOING THROUGH A TEMPORARY HUMAN EXPERIENCE.