Also inspect your kill switch lanyard. If any doubt replace it. I saw this same thing happen at Truman many years ago, takeoff at tourney two were ejected, both had pfd's on lanyard kill switch attached. Lucky for the two there were several boat around to rescue the two from the water, while another boat placed his boat next two the driverless boat and killed the engine. Been a long time ago but stays with you, could have ended entirely different.
Thank you to the OP for reminding us all, and hope you recover soon.