PTSD and Long Term Cognitive Impairment


I have been forcing myself to go back to school and during a breakdown over an assignment realized that I don't study like I did before my first surgery. My team theorised that I developed PTSD during my stay in ICU and I've found it's been getting worse when I try to study and I just can't understand something so simple. I feel like I'm so stupid and fall behind easily and I don't know why I want to know why I can't study. I looked up briefly and read that critical illness/ICU PTSD has been linked to long term Cognitive impairment and I just don't know what to do or how to even get tested I want to know why this is happening I don't get any support around me when I struggling with school.