While you're waiting, you should check out your university's Academic Misconduct procedure - that will explain in detail what happens once suspected academic misconduct is flagged. Remember that academic misconduct can mean a number of things, and sometimes captures poor academic practice, especially if happening at L6 when it is reasonably assumed that students know what they're doing.
You know the piece of work that has been referred, so perhaps have a look through it again to see what might have triggered this. Has some of the material included gone unreferenced, for example. You mention discussing your work with other students who presumably were taking the same assessment - how detailed were those discussions?
Anxiety levels will be high while you wait for this to pan out - so seek advice at the SU if you need support.