TRIGGER WARNING: SH

So, I SH, or I did (2 months clean!). But in doing so I ended up traumatizing myself. It started when I was in 8th grade and our health class didn’t cover mental health in middle school so my friends didn’t know how to handle it and I REFUSED to talk to them about it- even to my closest most understanding friend. So I dug a deeper hole and my friends said some shitty stuff and legit pointed out every scar (all of them talking to me at the same time) when I worked up the courage to wear a tank top and shorts. I also have anxiety and my mom gets mad at me for being stressed and irritable right before panic attacks- then just flat out walks away from me having a panic attack and I end up hitting myself. However now for the past year I’ve been having nightmares (some are even lucid) where like my friends are bleeding and won’t tell me why and I wake up panicking or crying. Have other people experienced this? Like giving yourself mild ptsd because of another mental illness you had?