maybe part of the scary feelings are because it is your support system (T) that is injured. Maybe that calls up abandonment fears, and the need to DO something to head of that threatened abandonment.

but you don't need to do anything. T is fine! he had a small accident and just needs to recuperate a little. no need to catastrophize anything, and no need for you to DO anything to prevent anything worse from happening. trust him to take care of himself. He is doing exactly what he needs to do (let you know he needs a break for a day or two to get better).

I can almost see you head spinning round thinking of everything! Calm those abandonment fears - T is fine, T is fine. he probably broke a foot or something and needs to elevate it for a day or two. my T did that once!