Yeh you can catch Chicken Pox from someone with Shingles, its just you cant catch Shingles from someone who has Chicken Pox (maybe Nessa got mixed up).

Yeh most likely if it is Shingles your kids will get it, but then they may not. DH has never had chicken pox and MIL stuck him with every kid that had it when he was younger so he'd get it. Probably just depends on their natural immunity. But i think its better to get it for them now then later.

Did you GP say any more on what happens if it is shingles? I know that chicken pox can effect the baby not sure about shingles though.

Best of luck and hope its just a rash!