I am so sorry, I've been reading this, but I don't know what it could possibly be.
I would say, if she passes and you can afford it, have a necropsy done by a state vet. The costs vary by state, if what I read on here is correct....

I would say, if she passes and you can afford it, have a necropsy done by a state vet. The costs vary by state, if what I read on here is correct....