Carla that is fantastic news. I wasn't sure whether that was possible (a home visit) but for your phobia, I think it should be and I am delighted that he is coming.
I am assuming the reason you are seeing the psychiatrist is for the phobia and not something else? I am not prying, just it seems disturbing (to me who is thinking about getting treatment) that seeing him about your phobia is actually making it worse.
I am intrigued by your situation and how you have managed to hide it from everyone. Surely people can see you won't leave the house? What about your firend who is coming? What excuse do you give her for not going round to her house occasionally? Sorry if I am being too curious, just...well...I am!