Hi
Welcome to the MedHelp forum!
I agree with Caregiver, you reached near strangulation. This can cause damage and bleeding into the brain. Please consult a neurologist promptly, get your self assessed. Also consult an eye specialist for a complete eye examination. It would be wiser to go to the ER immediately. Take care!
Yes.
Get another hobby.
You have experienced minor brain damage from excessive venous pre-load.
Look up "near strangulation" in the medical databases to marvel at how close you came to become a vegetable.