I just got some oxycodone to finally get rid of this migraine that i've had for 5 days. but i seem to be very sensitive to sound. known side effect?

Migraine : Sensitivity to light and to sound are very typical of migraine headaches. I am not aware of sensitivity to sound being related to the oxycodone. Go see a neurologist or headache specialist if you are getting headaches lasting 5 days. Work on finding a med to prevent the headache in the first place. Also see if you are a candidate for a "triptan" - very specific for treating the acute migraine.