Thankfully only a mock, but I was stressed about a physics exam so I barely revised history, spent all lunch revising it with two friends, got to the exam late in a hot room with no windows (I get separate room and medical breaks), then had a migraine about 20 minutes in.
Finished the mock after school the next thursday with my history teacher as an invigilator with one other person, while the humanities department staff were loudly talking about parkour just down the corridor and said history teacher was clearly trying his hardest not to laugh.
I got a 5 on that mock, was predicted an 8. :/