Any advice?

I’m 16 I know this sounds so stupid and I sound like an idiot teenager that is being dramatic but please someone give me some advice on why what people say don’t matter.

So I’ve missed about 12 days of school since it has started. I have really bad depression and anxiety and I worry about things all day every day. I recently just missed three more because I was planning to kill myself and now I am not going to. Btw I do go to counseling/therapy.

I go to small school and every time I miss people make sarcastic remarks and talk about me behind my back always talking about I stay home because I’m lazy or fake sick and idk people really bother me talking about me. The teachers do it too. All the teachers tell me it’s unnecessary how much I miss but when I’m really down in my depression I just don’t care then I regret it afterward. Right now I’m having horrible anxiety thinking about going back tomorrow and what people are going to say to me or what teachers will say to me. Idk what to do. I keep crying and worrying about it. I know I sound stupid 🤦🏽‍♀️