Many young women also feel guilty or distressed over their low libido....So... you're so stressed about work that you don't have sex, and then you're stressed about not having sex. Stress! Stress! Stress! What do you think about all this stress as the cause and the effect of not having sex? It strikes me as a shallow and lame explanation for things.
I tend to think that the reason people are doing whatever they are doing is because it's what they want to do. There's something irrational about saying I don't want to do what I don't want to do. Or, to turn it around, I want to want something. If you want it, you want it. If you don't, you don't. Start there. Too busy? Hopeless!