I am having a similar inncident right now.
It seems the shipping gave our silkies what is called WRY NECK which is when they get a little brain trama.
I am giving mine, Vit E, Vit B complex, Selinium, prednisone.
Mine has improved greatly in just a week. But his head is still bent a little, and he walks backwards, and flips.
I'm hoping for a seedy recovery for both our expensive special little guys.
Go to browneggblueegg, and look up crooked neck or wry neck. It will tell you what medicine and how much to give.
Also call your vet. They should give you some prednisone. Print out the pictures on the browneggblueegg site to bring and show them if they don't believe you, thats what I did. After the pictures my vet was really nice. He gave me prednisone, selinium, and some syringes for $3.