how to report cheating?

Hi all, I know this is a really serious accusation but at the end of my CHEM 40A exam today (with Cohen) I saw a lot of people swapping answers and still writing as we were lining up to turn in our answer sheets along the stairs. I think someone told him and I filed an academic integrity report, but I don't know if that'll change anything. I worked really hard studying for this exam and the class might get curved so I feel really crushed. Is there any way to fix this that's not just having stricter monitoring next exam?