Poor old Ws2! Even if you had the patience of a saint, it's hard being unintentionally neglected. But you've been given some rather lovely advice.
Enjoy your submission through being his diligent servant - look after him and offer small, thoughtful services. Maybe he's a grumpy, complaining patient and most un-domlike. Think of it as lesson in submissive humiliation and accept it gracefully. Now is the time to journal or blog - why not here and allow others to support you? Why not sublimate those urges by writing some hot steamy stories - present them to your Dom as a kick start for when he's better.
Do you have rules and rituals between you? Are you diligently following them, even when he's not checking up on you? How pleased and proud he'd be of you if, when he's better, you present him with a truthful report of how diligent and mindful you'd been while he was 'away.'

And of course, if allowed (I hope) take care of your own orgasms. Make a project of it and see if you can find your G-spot! I surely can't!

Patience, sister. x x

PS. The loss of a big toe is not trivial, and being a diabetic, he may have difficulty healing. He must be worried.