I understand where you're coming from. My W does the same thing, taking my suffering with stress and depression very personally, as if my lack of continual "bliss" and "happiness" are somehow her responsibility to control or a bad reflection on her.
Please don't let it go any further in your mind than that -- what my W now refuses to see is that even at my lowest, I never really stopped loving her at the same time. In fact, the very thought, conscious or unconscious, that my W was unhappy as a result of my state of mind only made me more depressed -- it's one thing for me to suffer, another entirely if it impacts my loved ones as well.
Undoubtedly there is now a lot of post-vacation stress adding to the situation. (What's my favorite saying? I need a vacation to get over my vacation.)
I really agree with what the others have said. Talking and communicating openly and honestly can only help.
