Stimulants can increase anxiety and stress, and your focus on them. You may need more support to work past this event and get back on track (therapy or counseling).
I know it feels really life-altering now, but it is absolutely something you can recover from (failing at uni). There are many, many successful people who stumbled at one point. And those with ADHD are often “late bloomers.”
I’m wondering, too, if you can get some sort of medical waiver or leave to lessen the impact, since you were very sick.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism