Thanks for the replies everyone! I might take a little longer off before I go back to work- there's no rush... I will at least wait to see how I'm adjusting to the outside world before I give work a date I will be back.
The graduated return is a good idea too. I am only going to go back part time at first.

Re my therapist... they haven't really let me down, it's more just been my interpretation of things that have prevented me seeing him while I've been in the hospital, none of which were his fault, and a few misunderstandings via email. I still have feelings of being abandoned though and I'm not sure if that will be a hinderance to our therapeutic relationship- but I'm going to see him once I'm out and I guess I'll just see how it goes.