Yes, your university would inform you first if your paper was under investigation for misconduct. Just because they made a public announcement on the topic of misconduct doesn't mean anyone actually committed misconduct, it may just be one of those annual things, to remind students. If you are worried about being accused of misconduct, then whatever you may have done to make you worry about this, I just wouldn't do it in the future. There's no good reason to commit plagiarism.
- Rosie