I’m really sorry to hear this, but I think you’re doing to the right thing to take a break from this project.
I think your VN is unique and important, and I hope you don’t give up on it. I know you can solve any challenge with the plot or characters eventually.
Please try to get outdoors and find some physical activities you enjoy. That can sometimes do wonders for things like carpal tunnel or motor tic flare ups. It definitely sounds like you’re under an unhealthy amount of stress right now.