I have had my head slammed into a wall in jan 08 and over the years i have noticed a lot of different effects starting with short term memory loss, now im experiencing moments of dizzyness, headaches, and loss of simple math functions, adding subtracting, multiplication, and i have always prided myself on being the human dictionary but not finding spelling words hard sometimes,

I am unsure if there is anything that might be the cause of it from residule effects of that concussion and thats mixing with my bipolar/manic depressive condition and stress as well but i am trying to get through college and algebra is just not working for me, im struggling BIG TIME!

can anyone tell me that im not imagining these symptoms? can there be post traumatic brain injury symptoms like this?