Hi. I'm Very Concerned For My Child. He Did Have

Hi. I'm very concerned for my child. He did have a concussion about a year ago and has been fine since then. He's 22. The first week of October, he started passing out. He ended up admitted to the hospital and a battery of neurological and cardiology tests were run. Everything Cardio came back negative. There was some abnormality in his brain waives, however, we are still waiting for our Neurological appt. Now he is having seizures. Yesterday he had a seizure and was home alone. He bit the inside of his mouth and lost control of his Kidneys. They have ran dye through his brain and said there are no bleeds or tumors. He just seems to be getting worse on a daily basis. I'm concerned that something has been missed and am at a loss.

Help! And Thank you.