What a great dream! Way to go with the trained-to-put-up-with-bull-when-thrown-off-track figuring out!

The first thing I noticed was your falling asleep on the train. That interested me because I have read that dreaming you are falling/asleep when you're already asleep is about as passive as you can get, kind of don't want to see/know this and whatever it may mean. That's what I think going into the tunnel may have been too, the tunnel was stark white, nothingness (since you "rejected" falling asleep in the dream?). The only thing I have read about white, square "rooms" though is for hospital dreams? You have any hospital situations in your life?

Too, there is "tunnel" vision. Maybe you are seeing things only one way instead of in a broader, forest-instead-of-trees way in living "color"?

With your recognition of what the dream meant to you (and it is your dream) I am a bit confused because why would you have such a dream if you no longer have that problem? You are with your husband instead of the people in your past life, as you say so why the dream at all?