Unfortunately, yes you are. Without right to work in the USA, it's practically impossible to get any decent company to even interview you.
You might get work doing pt.135 charter/cargo ops, illegally of course, but no regionals will touch you. I've been there and done that! It might be that your J1 sponsor might be willing to extend your visa, but I think it only lasts for 6 months.
Best bet? Go down your local bar, chat up a few birds and marry one of them :-)