Anxiety about going back to work.

So I work in a mental healthy facility and I am extremely nervous to go back. During my pregnancy my CFO who is my boss was so negative and mean to me. Didn't understand that I had pregnancy brain when I messed up little things. Even my Co workers saw that he was rude to me. I've worked there for 2+ years and I love all my Co workers and love watching people with mental health and addiction get better. However I really don't want to go back because of my boss. My husband says I don't have to go back and I can be a FTM. But I did that with my first child and I hated it then because my husband thought that meant I was his damn maid slave lol. I don't know what to do. Any advice?