I believe that subspace and by the sounds of it the experience you when were returning from work are linked because they are both states of trance. Any hypnotherapist worth his salt knows that the most important phase of caring for someone in a trance is how they are brought out of it. I do not have any experience of transfer of experiences as you suggest, and could only tell you how I am brought round, which I am very willing to share with you if you would like.
The only experience I have had which is similar is, once, when I was very deep he said something completely innocent, which triggered a semi repressed memory and I panicked. I felt incredibly sorry for the poor guy, because he had no idea what had happened, and I was not in a state to explain, and just kept both pushing him away and asking to be held! Since then we have discussed in some detail that semi repressed memory. That was useful healing in itself, and he now has a better understanding, of might still be a trigger and how to handle it, if he has to. It could be that you need to unwrap your experience and face it in the same way - but I would not advise doing that without suitable support.
Additionally, if I was in your position, I think I would make an appointment to see an experienced hypnotherapist, since they are the experts on managing trances. Explain to him what the problem is, and see what his advice is.
cariad