You sound in trouble. I guess the good news is you don't have the power to infect anyone elses thoughts wsith bcraziness.
The bad news is,you are infecting yourself with craziness. When my mind attacks me, it is like a hamster wheel, spinning without any controll. It some times is not only telling me what I am experiencing isn't real, but how I can prove it, and why it must be real, AND how I can fix it, and why that won't weork, etc. etc.
It took me many years to learn how to calm down and stop the wheel from spinning. When I learned to bresathe and meditate I could stop. I could let it all go, I could recenter myself so I did not have to feed my paranoia and defend myself. I could remember that it is todAY. What I am reacting to is my response to what has already happened.
It is not today, I can be alright.
To tell you you are not alone may be all I can do to help. To tell you how this overwhelming feeling of disconnection is experfienced by another on the same journey may give you are stonger sense that it will pass. It has for me. But, it still comes back from time to time. And I have been dealing with it for 25 years.
MAY God bless you and keep you may his countenance come upon you and grant you peace.