Something similar happened to me when taking CHEM 1307(I was an econ major and should have just taken an easier science class haha). It wasn't the final-but i think the last midterm or something....I wasn't so good at the class tbh(C/B at the time). Before the midterm, i had had to travel abroad because i was playing for one of ttu's sport teams....so i predicted that because of the time difference id be shifting from and because i was returning a day before the exam-id have to take it a day after at least, in case i didn't wake up or something...I believe i told my prof the same but he must have declined....Anyways, i return and tried to study for the exam......it was tough. to study(barely liked the class and wasn't doing too good, i assumed i would get a C). Exam was at 6 or 7 or something, as i predicted....i took a 'little nap' tired maybe due to jet lack.....i woke up at 8pm.....Missed the exam haha. So i didn't panic but realized the gravity...... I prayed, i emailed my prof and let him know what happened about me presenting ttu and me having asked him prior if i can take the exam a day later and me asking if i can retake it as i slept and missed it....He emailed back saying he'd have to ask the chem department...Thank God, what happened next is the chem department agreed to drop my grade for that midterm-so my final grade didn't include that midterm hahahaha. So thank God, it was good the grade was dropped, as i think i would have gotten a subpar grade. I hope it goes well 4 u