yearling down

I have a yearling doe down and don't know what the problem is.She didn't eat yesterday morning but just hung around with the other yearlings.When I got home yesterday,she did not come in with the others.I found her laying down and she felt cold.I put her up and gave her 2cc of penicellin.She wouldn't try to get up.This morning ,her head is turned back and she is not trying to straighten it out.She has no color in her eye lids.She was wormed a couple months ago with the rest of the herd.I gave her another 2cc of penicellin,that is about all I have to give her.Any ideas to get her on her way up????