:hugs
Sorry about the chick.
Hatching isn't for everyone, but you may change your mind as time goes by. Unfortunately, sometimes things do go wrong and it can be very sad.
I'm sorry about your chick, I agree, putting her down is probably the best option.
For a chick this small, a sharp pair of scissors is quick. The article below may be helpful to you, it's tastefully done and may help you through this...