Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

Try to write down everything you remember about the exam. The examiner's looks, the room, the questions. Then go have the meeting. Lost exams cannot be that rare. there must be a procedure.
As to the rest? Focus on the studies, all the other problems can still be problems in 3 weeks' time. If your friend is a real friend, she can give you a little space and time.
I didn't get an email from my professor this morning, but I did check my school's website and she posted my grade. It wasn't as good as I thought it would be, but it's better than a zero!
I just have to get through these next 21 days, and I will be able to breathe again..
Thanks for your comment! <3