We get WAY less nicotine than smoking ciggies. Our clean nic is absorbed in the mouth, and not the lungs like tobacco.
Our bodies also have a built in warning system when it's getting to much, headaches, tummy aches, feeling poopy. I strongly believe now that our bodies are FAR more well equipped to the stop smoking/vape instead process than our thinking brains are. Pay attention to your body, listen to what it's saying to you. It knows what it's doing. The instinct for survival will always attempt to return us to a healthy state if we let it happen.
Chainvaping or powervaping is a perfectly normal part of the process. Pretty much everyone on the forum here has gone through it. You are still detoxing krap that built up over years out of your system (in those early months) and the extra hand to mouth action is coming from the years of the built in habit of smoking to replace that toxic gunk from ciggies.
The brain just thinks "if I do this motion more, the feel good stuff will be replaced" (please bear in mind that feel good stuff was the chemicals used to alter brain chemistry to make ciggies more addictive) Stock up with extra batteries, extra juice, more carts or atties and just ride the wave. Eventually, that subconscious urge runs it's course, the gunk goes away, and the brain repaths itself back to where it was before you started smoking. The power vaping slows down on it's own.
You just realize one day your battery lasted the whole day and not 4 hours