(IMHO) Anxiety is a mind-body thing that is generally (but not always) brought on by how we are thinking. Which can include what we are thinking about emotions and senses in th body. The body may feel something similar to fear and then the mind creates some story around it that can cause more fear..
Meditation is good for anxiety as is learning to witness your thoughts and realize you are not your thoughts. Also being open to the feelings within the body and not creating a story about them. Just silently watch and feel.
The worst thing for anxiety is bull-shit religious dogma that sets you against a mean little tribal deity who can supposedly know all your thoughts and so judge you accordingly. This type of psychological terrorism is the farthest thing from genuine help and health over anxiety.
How very sad the JW's are playing this card as if they had a valid answer and cure. When they are part of the problem.