Honestly these type of these things happen. I'm assuming OP, that you used either gold or some other type of material good for sensitive ears. Some babies/people are just allergic or can't tolerate pierced ears. My ears have always been really sensitive and I've had mine pierced since I was a few months old too.
I would do the same and just let them heal and try later if she wants. I would be disappointed too but she probably won't even mind until later :)