I have always read that force feeding water is not a good idea, unless experienced in the practice.
Just what I read, that it's easy for them to drown that way. It sounds like when you shot the water into her mouth it went down her windpipe.
For hydration I always use soft-bodied feeders like hornworms. I have heard about injecting them with water for hydration as well, but I haven't done that. Also have you read about giving them a "shower" ? Propping them up on a fixture in the bathroom shower, turning the water on and pointing it towards the wall for an indirect mist. Though remember, if the water is warm to you it is hot to your chameleon.