I have had to deal with this and it is actually not something you need worry too much about. I work in early childhood education and was being seen for depression and bipolar. I knew the office coordinator because her daughter went to my center. She and I became very good friends and my private care never became known at work. She is very professional and knows that confidentiality is crucial and breaking it has dire consequences for her. You are safe and I am sure she will not figure it out and if she does she knows many people in your community who have sought help.