The pounding does two things. It over-stimulates you with noise and it causes vibrations that can subtly impact your brain. The vibrations should not put you at risk of further damage. It just brought your symptoms back to full force.
A day or two of rest and head ache meds should bring you back to your pre-MRI state.
Why did they do the MRI?
Mark in Idaho
58 years old, retired due to disability, married 33 years, father of three, grandfather of four, Suffered a serious concussion at 10 years old (1965) stopped most driving after last concussion at 46 years old (2001), Post Concussion Syndrome/Multiple Concussion/Impact Syndrome with PTSD, immediate and short term visual and auditory memory problems, slowed processing speed, visual and auditory processing difficulties, insomnia, absence seizures, OCD, 14 concussions since first concussion at 8 years old, Taking paroxetine and gabapentin for 12 years. Added L-Tryptophan and reduced paroxetine by half 3/2013
"Be Still and Know That I am God" Psalm 46:10