I can really relate to your dream. I have a strange tendency to got to work nude in my dreams. My T said that it has to do with feeling vulnerable. I looked at her like "no dah like. What you don't think I can interpret my own dreams." I remember once I was working nude except for a dark blue smock and a customer said that I was a bad employee. Then, a co-worker defended me. The dream stuck in my mind because I had never dreamed of a co-worker defending me and usually I am so busy trying to conceal my nudity and noone never even seems to notice it. So, the dream is familiar to me.
I suspect that you feel vulnerable with T and fear his rejection. I hope you will gradually work towards sharing more and more. But it can be hard though.
As for missing T, I just left a voice mail for mine saying that I miss her.