Here's the statute for prostitution in your state.
(1) Except as provided in KRS 529.120, a person is guilty of prostitution when he engages or agrees or offers to engage in sexual conduct with another person in return for a fee.
(2) Prostitution is a Class B misdemeanor.
Arguably you could be charged with a crime. However, she's not going to report you, because she would have to admit to a crime in order to do so. And she's unlikely to be an undercover officer or they would have pressed you to make the date and show up.
Typically, police arrest johns when they come to keep the assignation, because even though police can figure out to whom a phone is registered, they cannot prove whose making the call unless/until he keeps the appointment.
All the same, what you did was unwise to say the least. You could have walked into a sting, or worse yet, a blackmailer. You appear to have dodged a bullet this time, there can be potentially serious consequences to doing something like this just for fun.