I have that happen. It is horrible. It is like your mind is on one of those spinny playground toys and the playground bully has ahold of it and is spinning it faster and faster and won't let you get off. When this happens I take a xanax. It stops my brain, like rebooting a computer. Makes everything quiet for me, then as the med wears off I focus on one thing at a time, breathing and letting go of all the extra stuff I can't do anything about. Usually one xanax gets me off the merry-go-round and refocused.
Zen