You haven't provided any facts or details of the incident. Defamation involves a statement of fact that is untrue and damages your reputation in the community. Without knowing what happened, an attorney can't say if you have a viable case. Just being "embarrassed and humiliated" is not usually enough to justify a suit.
Without more facts how can one determine your damages?
My name is Stephen R. Cohen and have practiced since 1974. I practice in Los Angeles and Orange County, CA. These answers do not create an attorney client relationship. My answers may offend I believe in telling the truth, I use common sense as well as the law. Other state's laws may differ.. There are a lot of really good attorneys on this site, I will do limited appearances which are preparation of court documents it is , less expensive. However generally I believe an attorney is better than none.