Please understand I am not admitted to practice in Tennessee so my comments are general and may not be taken as legal advice.
If you don't want someone to contact your current employer, the best way to achieve that is to ask them not to. Although you might think it is implied that you do not want this, it is better to state it up front. There is nothing illegal about what happened here. Therefore in my opinion you have no recourse. Also, if the most that happened to you was discomfort for a couple of weeks, you have no damages. If someone makes false statements about you that you that cause you to lose a job opportunity, that may be actionable. That did not happen here, as I understand it.