Ended up taking a Pre-assessment of how I would do on my SAT. Note that my SAT is in december, like 2 months away. I end up taking the SAT 4 hours on saturday and as I worked, my mind just let things float away easily. I struggle through the math problems especially, but my brain just does not want to work and actually THINK. Ended up getting a 55% when I should be at around a nice score of 78-95% as avg. Everything I learned/ noticed from 2nd grade - 11th.... gone, not noticed cause of innattentiveness/short term memory.

This was without medications.
Will an EEG scan determine the activity in my brain enough that it is correlated to ADD?
During my previous years, I always hit my head because of the lack of attentivity in life and could it be a concussion that my head has s**** brain activity levels?