Just got a call from my supervisor. She's annotated my draft, and thinks when I make THOSE changes, I will be ready to submit. I have no idea how long that will take, but will have a better idea by the time I have a look this afternoon.
EDITED TO SAY: I have got the draft - corrections look numerous but she assures me I should submit within the next few weeks, which is a HUGE relief. Thanks for all the e-hugs!
If only I weren't such a control freak, this process wouldn't be nearly as tricky! Thanks for all your good wishes - I really appreciate it.