Isolation

Im a student in year 11 and all my grade are good as well as my behaviour , but there’s one punishment that I received in year 9, an internal exclusion due to my disrespect toward teachers, it was the only time I received this big punishment and I fully realised my fault. But until today I’m still really worried about this discipline record that it will caused me to be reject by the dream uni I wanted to go to. As there is record of punishment we had throughout the academic school year, so I’m worrying they will able to see and reject me, will I be ok?