The MRI is for ruling out something else that may be causing the headaches. The probability of seeing anything on MRI is low, but it's frequently recommended for anyone who starts having unusual headaches that has not been head achy before.
There is really good research out there to support the use of acupuncture for the treatment of headaches. You might want to look into that. And, there are also mechanical causes for these types of headaches that involve the upper spinal segments of the neck. These can sometimes be treated by an appropriately trained PT or a Chiropractor.
I would wait on PT or Chiro until you have the MRI results back.
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