I'm really pleased you phoned and got a good result; remember that for next time you have to make a difficult call!
With regards to your fiance, I would keep things pretty low key, and follow his lead. Get some food in that you know he likes so you can have a meal together, and suggest some simple activities he might be in the mood for; watching tv or a dvd, going for a walk, a soak in the bath. He might just want to go to bed, depending on his meds.
I would just see what he is feeling like when he gets home,and be prepared to talk if he wants to talk or just be around if he doesn't. Just behave normally around him; be yourself.
I hope it goes really well.