Thank you =( I took Mia to see a vet today, and he said she looked good. Not emaciated, no patches of fur missing, no nasal leakage or from the eyes, and not dehydrated etc. He asked me about the cage conditions, and diet.
Anyway he said because I buried Izzy and didn't bring her in it kinda left him in the dark (still feeling dumb about that one, I was too hasty) but to know much more he'd need to sedate Mia and do blood tests, and he said to watch her for a 2-3 days first and see how she does.
Right now she's awake and making back and forth trips to munch on bml and fruit, but she isn't doing much else. She sits in her wheel and doesn't run

I'm just really worried about her now..