I suffered from multiple concussions throughout my early 20's and your story is exactly how my day-to-day life looks like. If it doesn't have a note, it doesn't really exist. It's nice of your university to accommodate the situation because when I told mine, they thought I made up a problem. Nobody in my family even understood the struggle to today. They think it's easy to forget things but it's not. I had multiple memory assessment throughout my entire teen to prior the accident and it was impeccable. So, at first seeing the decline made me angry and I went through denial phase as well. But now, I already make peace with it. I keep notes, reminders and tell myself it's OK to take time to learn anything at the speed and pace I am comfortable with.

You'll be fine, just make sure to stick the neurologist plans and really watch your diet. Since the accidents, I learned that I don't do well with carbs like Rice, so I am mostly on a carnivore / pescatarian diet.