I had a similar situation myself mate, although the issue for me was the pup wouldn't leave the house,
i would get my gear together to take the terrier and PUP for a walk and the dog's would be bouncing around all over UNTIL i opened the gate and then the pup would just collapse into a shakin wreck! well this took almost 3 days of gentle coaxing just to get the dog out of the gate, it then took me a whole week to get the pup 6ft away from the gate.
all in all it took nearly a month to get the dog to walk to some local fields..................anyway the moral of the story with a nervous