In cigarettes, there are other things in them that are addictive, besides the nicotine. You probably experienced some withdrawal when you switched to vaping. Now that you are no longer vaping, you have to get past the addiction to the nicotine that you were still getting in the vape. That's why most of us vape, to get the nicotine that we are addicted to in the most harm reduction way possible, and still have that sensation of smoking. Smoking and the hand to mouth movement was/is our way of de-stressing and relaxing. A way to step back and chill.
I wish you luck in getting your body and mind back to a healthy place.