God, to make these dreams even worse, I once literally did completely miss an exam in college, as in, I somehow missed the announcement of when it would be, and

God, to make these dreams even worse, I once literally did completely miss an exam in college, as in, I somehow missed the announcement of when it would be, and skipped the study period in the morning when it was given, and then only learned about it later that day in the lecture when everyone was talking about the exam! Once you actually live that experience, it (or versions of it) will haunt your nightmares for the rest of your life.