I think that, for some reason, people downplay the psychological aspect of the test. A precipitous drop in one's score can certainly be due to those factors. I wish I had good advice about that, but I don't. Maybe others can chime in.
I took a scoop of prewirkout and went to lift and I threw up afterwards. I never throw up. But it's okay cause in 8 mile Eminem did too and he killed the battle.