in April I suffered a concussion. My head bumped in someone elses at the gym. I feel nauseous, confused (but did not pass out or throw up) and go to the emergency where they tell me I suffered a concussion.

I take one month off from all activity, bedridden most of the time, and moving extremely gingerly, and moving my head around as little as possible.

after the month is up, I feel good, and feel like I haven't lost any intelligence at all. I start going back to the gym, which is a non contact cardio kickboxing class. I start noticing that my memory and concentration and ability to think logically decrease whenever I engage in any strenuous physical activity. So I reason that maybe my brain isn't ready for this yet and stop the physical activity. After said physical activity (which I took part in for about 20 days) I feel good and intelligent, and able to think logically, however at this point I am worried because my attention span while studying is less than it used to be. But I am relatively okay, and just figure I need to give it a little time

One day, I eat a disgusting calorie laden sandwich which was giving me stomach trouble, so I induce vomiting and throw it up, I also notice that purposely throwing up puts alot of pressure on my head. After this, I notice that my concentration has slightly improved. Over the next couple of days I force myself to throw up several times maybe 8 or 9 times.

Now the nightmare begins. It has been 15 days since I last threw up, and my ability to reason and think logically has completely disappeared, I can't even have the same level of conversation with people I was capable of prior to this. I am bewildered and looking for a reason as to why this has occurred after I forced myself to throw up . I am not educated in how the brain operates, but part of me believes that the new connections my brain made after my concussion were "short circuited" when I exercised and got my blood pumping, I feel like throwing up has caused my brain to go to back to these damaged pathways permanently, or that throwing up has decreased my threshold for strenuous activity to an extremely low level and I will be intellectually handicapped for the rest of my life. It is extremely disturbing to me because of possibly how preventable it is for me to suffer this fate.

what is going on in my brain?