What do I do?

I’m 13. My mom passed away when I was 11. I can handle truth. My dad is getting remarried to a person that NONE of my friends or my older brothers friends like. Right after my mom passed away I was diagnosed with Depression and Anxiety. I take 50 mlg of Zoloft. I would self harm and I haven’t done that in 4-5 months. I thought I was doing fine but now everything is kind of coming back to me. I have recently had thoughts of self harm but never did it. I don’t know what to do. I WAS diagnosed but at the same time I feel as if my life could be worse. All my friends parents are divorced and they are not financially stable. My dad has money and it make me feel guilty thinking that nothing is wrong. What do I do?