Screwed. Sorry, live and learn. Everyone has some pretty bad first season recruiting stories.
There's a possibility that your assistant will sign some players, but I can't recall the rules around that.
*edit: looks like that only happens for a team that hasn't put forth any recruiting effort - a ghost ship is assumed and all but two openings are filled. So looks like you'll be rolling w/ a 7 man rotation this season. Better play lots of slowdown.