I definitely do not want to make this about me, but your disappointment resonates with my current situation right now! I am also a medical student, and unfortunately I know how competitive it can get. And on top of how much we have to study, the last thing we need is to be dealing with nonsense with people around you. In terms of the exam, honestly don't give it a second thought! When we're practicing doctors, you will not have a 'heads up' on the diagnosis of your patient, not will the grade of that test matter to your patient. Just think your medical education is for *you* regardless of what others are doing around you (as unfair as it may be). Trust me, I know that story too well...For example, my PBL classmates made a WhatsApp group and consulted with each other the questions during the exam! I got a C in that class without having cheated, I don't know what the others got but at least I know my conscience is clean! You know what I mean?
Hang in there, I know how hard it is to suffer from a mental condition and still have to invest every ounce of energy you have in studying so hard. Take care of yourself and you'll pull through!!