When I saw your post, I decided to register in order that I could reply. What you describe sounds like an aphaisic episode which I understand can happen with migraine. But please do what you can to be certain it is migraine and not something more serious. When my daughter was 10 years old, she began having migrainous type headaches that were relentless. She would experience what she described as "surreal" episodes as well as some numbness and tingling in her face and arm. She suffered through two aphaisic episodes where she was unable to speak or fully understand what was being said to her. After a negative CT scan, they concluded she was suffering from migraines (which do run in our family). Relying on mother's instinct I changed neurologists after finding one who agreed to perform an MRI. The MRI showed a blockage of approx. 99% in the middle cerebral artery of her brain. She wasn't suffering migraine, she was suffering TIAs and strokes. Had we not caught it when we did, they don't figure she would have lived out the rest of the week. Fortunately, she has recovered extremely well and is about
as normal a 20 year old as you could find. But had I not taken her symptoms seriously, things may well have turned out very different for all of us.
Best of luck.