When can i skate again?

well last monday i fell when i was skateboarding down a hill and i hit my head and got knocked out and had a seizure then i was airlifted to atlanta where i awoke the next morning with a concussion and some scrapes anyway i stayed at the hospital had an mri and an eeg scan i think and they said i was fine but i was also on morphine during my stay at the hospital anyway i left wednesday and now im feeling alot better and i would really like to start skateboarding again but my mom wont let me