Is this workplace harassment?

Idk if this is the right place to post this so please forgive me but I have been dealing with some terrible anxiety health related issues and I’ve been going to the doctor to try and get it resolved however my manager seems to think I’m faking it or just going for attention she also seems to treat other employees better than me such as laughing with another co worker of mine when he said oh you should see a psych doctor

Is there any legal advice I can take here ? I’m in Indiana