[rwnspace]

The thought you had is affecting your meta thought about being affected by a negative thought, my friend.

All your body does is process information that passes through the brain and nervous system. Thoughts are just as primary as the senses that reflect something in the outside world. And your negative realisation was interpreted by the rest of your system as an archetypal 'bad situation out of your control'. That's being trapped, which is a very old situation for an animal to be in. Trapped animals look for a way out and if nothing yields they become inactive.

I've found reminding myself of the above helps me take whatever limited control I can of the threat (i.e. writing down and visualising what I'm going to do when I can solve it) and also taking some control of other parts of my life. You can trick your body by sending it soothing signals which are an antidote to the /type/ of situation you are in (if not necessarily actually solve it).