omd, you've all been through the ringer
It does sound like you have an excellent vet. Could she have been bitten by something? Have you checked their dog run for mushrooms? We've had some really bad reactions to mushrooms--some of which only pop up for a day and then disappear.
I have no suggestions for you except that when you visit her, bring unwashed shirts from you and your husband for her, as well, since your scent may also comfort her.
Maybe someone else has had a similar experience to yours and will chime in. I wish you and Skye all the best. Pls let us know her progress!