Jenny,
You didn't chicken out.. because you are still an egg. Not ready yet. You've cracked the shell a bit (I know, I was there!), but not quite ready means not quite ready. Nothing wrong with following your basic instincts and backing out of a situation where you did not feel comfortable. As Sherry said.. "Maybe next time."
I think it would have been worse had you gone forward with misgivings and had a bad experience. It occurs to me that we put ourselves at risk when we ignore the inner voice. You will be ready when you are ready, and not a minute before. You'll know. Each experience teaches us valuable lessons, if we are open to the lessons. "Next time", when you are ready, will be the right time, and you will fly out the door. ..
Lauren