Do I have any legal options against my boss who is spreading hurtful rumors about me to my other co-workers?

I work at a family owned and operated restaurant. The owner's son who is my manager has been saying horrible things about me to my fellow co-workers. I missed several days of work over a period of a couple of months. Provided documentation like I was asked to do. Eventually I found out that I'd been ill because I was pregnant. I informed my boss (the owner) of my pregnancy the same week I found out. Shortly after this, my co-workers began approaching me telling me that my manager (owner's son) had told them I'd missed work because I found out I was pregnant and that it wasn't my husband's child because he had a vasectomy and I'd cheated on my husband. They also told me he said that I had tried selling pills to another co-worker at work and that I was trying to draw unemployment. These are horrible lies being thrown at me and my family and at a time when we are trying to celebrate our expected new baby. The stress this puts me and my baby through are a big concern for me.