I agree, if your body tells you rest, then rest. You can't push through a concussion. I know another young student who had recovered then relapsed with post concussion after she started her first job where there were very bright, florescent lights in the office.
I keep a daily journal to see how I am doing and what things are affecting me. Some days i do light activity and other days I do nothing but rest. I take note of hours of sleep, if I exercised, took vitamins, what activities I engaged in or if I did nothing all day, if I meditated etc. Then I note what symptoms I experienced or how I felt that day. It has aided me in seeing what's working and what's not and I can also relay this to my doctor when I see her.
Just a thought? :-)