Hey, you're getting all kinds encouraging signs from XW so don't go around the BB saying you're a crappy DBer because that doesn't seem to be the case!
That was great that she told you she'd be super busy this week - she wanted to make sure you didn't get the wrong idea when she wasn't as available to spend time together. Obviously, she cares about your feelings.
Being supportive of her potential business idea meant the world to her, whether she goes through with it, or not. See, she didn't just go ahead and do it. Most women want approval from spouse or parent - just someone who will say: I believe in you and whatever your dreams are, I support you because I care about your happiness.
About the menopause thing - seems like she's too young for that. I don't know much about it. I think it's a simple blood test that is done to check your hormone levels. Diet and exercise have tremendous influences on hormones, depression, mood swings, hot flashes, etc. Women in my family have told me to start with soy supplements, reduce sugars, and look into progesterone cream from the health food store. It's good that XW recognizes something's up. Maybe a trip to the doctor would be a good thing, but don't push her.