My Mini Dachshund Is Sick! Please Help!!!!

[minniemoo]

my baby, Minnie is only 8 weeks old and I have only had her for about a week. She was eating and drinking regularly the first few days but now is doing a hiccup like thing and gagging alot and will no longer go near her food, like she is scared of it. She has puked numderous times the last couple days also. I just cant tell if she isnt eating becuase of the hicupping or if she is depressed I dont want her to be in pain but I also think I may a little overprotective... If you have anything that could help me let me know! we have a vet visit scheduled for thursday...