White mustang

So a few months ago when i had my exams, my preparation was not good because i literally skipped school for 2 and a half months. I didn't know what to do when the exams came around. I got very stressed and anxious.. so i couldn't sleep at night. I used to be so sleepy but as soon as my head would hit the pillow, i'd just get an aching headache. During this time, when i'd listen to the white mustang instrumental, it'd strangely really relax me and i'd atleast sleep for 3-4 hours. Anyways i just got passing marks in all subs. When i had exams now, i just didnt sleep.