So while I was drying my hands I watched in horror as my 9 month DS rolled once and before I could get to him, rolled again off the bed. This was about 15 minutes ago. He landed just flat out face down. We both screamed. I feel like an abject failure although I know that this sort of thing has happened to others before. I've called my clinics after hours number and am waiting for a call back. Other than the red mark on his forehead, he seems fine now but I am absolutely shattered and am still shaking. How will I know if there's something wrong internally? How do you know if he has a concussion?