Are you in the US?
If you want a for sure answer as to what happened/is wrong you could put her down/or wait and send her body for a necropsy to your state lab.
Necropsy and disease testing lab info
If you want a for sure answer as to what happened/is wrong you could put her down/or wait and send her body for a necropsy to your state lab.
Necropsy and disease testing lab info