I got a concussion today when can I exercise?

I got a minor concussion today after face planting into ice/snow attempting to snowboard. I went of a ramp and completely belly flopped. I didn't lose consciousness just bloody nose and bloody mouth. It took about 15 minutes for my symptoms to set in. I was dizzy, sever headache, and I threw up, I also was so tired I couldn't keep my eyes open. Anyways I went to the ER and I have a minor concussion. I want to do my exercise routine which consists of light weight lifting and semi intense cardio. How long do I wait before I can exercise? I feel super out of it still. The doctor really didn't say when I could exercise.