I/we hope they find what’s causing the problem, obviously. And that it’s a comparatively easy ‘fix’.
Just remember to keep yourself well, too. I know worry drives the idea of decent meals and sleep out of our heads, but do try to get some. Do you have any children or other close family/friends who can come and be with you, albeit at a six feet distance? You shouldn’t have to cope with this with only Tilly for support (as dear as she is).