I don't know what to do, I feel guilty?!?

Don't stress too much about it right now. Speculation will only make things worse, wait and see how he turns out, hopefully he is fine and there will be nothing to worry about. If he does turn out to be handicapped then you should provide him emotional support for him but most importantly forgive yourself, because carrying guilt around with you is not healthy, and it won't benefit you or make the situation better, what you should do if he is disabled is forgive yourself, accept that you made a mistake that anybody could have made (we're not perfect after all) and that something terrible happened from it, and then learn from it. That's the best you can do right?