<human>: Feeling very anxious and upset right now and thought I'd ask for advice. Basically, I overheard a conversation between my direct supervisor and our executive director criticizing me personally. They thought I had left the office I think so were gossiping about me. Specifically, my ED was complaining I had not been smiling lately, that i seemed so damn unhappy, would it kill me to smile, etc. My supervisor joked that she wants to shake me sometimes because I guess its annoying Im not more upbeat. 

They both know I've been diagnosed with depression and anxiety and am seeking medical help. Previously, I had overheard them joking and making light of my mental health issues over the phone - our walls are pretty thin at work, so I think they assumed I couldn't hear. When I told them that I overheard them in the past and that it made me feel uncomfortable, they more or less said I overreacted. 

I just feel really upset as before I thought it was a one time thing but now it seems that its been going on for a while and is a regular occurrence. I have no idea how to handle it. We are a small staffed place and have no HR department. Should I just keep this to myself and try to forget it is happening? I think it would only cause them to talk more if I confront them again. I've never had any complaints about my work so not sure why they hate me so much but just worried about my future there since they seem to dislike me.

Can you provide a brief overview of the text?
<bot>: Overheard my direct supervisor and boss gossiping about me personally. Feeling very anxious and not sure how to handle it.