*Edit: I checked some of the stuff more out in detail. While some concepts on this are valid and backed up by sience, others like RSD are not. Use this as a springboard for learning, not as a valid source in itself. Yes it says so in the corner already. But spelling it out might help.
People are more complicated then a diagram from the internet. Never forget that.
Shot in the dark, not a doctor yadda yadda
Sounds like it could be burnout. (not only workaholics can get one) You can try some mitigation strategies for that and see if they help you.
In fact, autistic burnout is a thing that can happen to autistic folks (as opposed to occupational burnout)