I had an accident in work 18 months ago. I suffered a head neck and shoulder injury. There was no loc but I was confused and disorientated in A&E after. Since then I've been diagnosed with post concussion syndrome /migraines. I have an increased sense of smell, which also makes nausea work. I had an mri which showed a small scar on my brain. On a number of occasions I have smelt 'burnt toast' when I'm the only person at home and the toaster isn't being used. My concentration (brings on migraines ) & memory (times dates of medical appts) are affected. Should I get a second MRI?