i know im gonna sound like your mom here, but concussions are serious. way more serious than you are grasping.
you didnt just hit your head, the actual structure of your brain is swollen and the smallest blow to it could cause you to hemmorage and die very easily.
ive had 3 major concussions (loss of consiousness, partial amnesia) and i was in the same situation as you. i felt my parents were being unfair about the issue. i realize this now, the truth is my parents were caring about my safety. i didnt ride for a few weeks, and when i got back on skis i was as good as new.
obviously, your parents care about your well-being too. instead of being frustrated, take a step back and try to appreciate what they are doing for you right now.
be patient. in a week youll be skiing.