I don't think my cats would be good indicator. They act strangely ALL the time :-)
My service dog knows when I am going to have diaphragm spasms she refuses to go when we are heading out and acts out. I now know she is telling me not to go out.
Alex
My dogs know when I am having a bad day. I have a Newfie that will follow me everywhere.
If I start to wobble she leans against me to make sure ident fall.
I think animals can sense when something is wrong. My cats seem to anyway. They pay more attention to me during relapses. My husband is diabetic, and sometimes his sugar goes too low when he sleeps. The cats are both all over him, trying to wake him up.
Don't worry too much about what other people think... They don't have to live your life. The pain and fatigue can suck the life out of you.
Hang in there.
(((Hugs,)))
Tammy