O - take a break!!! Your emotions and thought are going to cycle. It's normal and it's okay.
Let's get a couple of things straight:
1. You're not just going to get over it. 2. You're not just going to be able to stop thinking about it.
Let's accept that as facts.
Here is another fact - for you to get to a place where the need for answers basically disappears, it will require a process of proactive healing.
Moving forward, know that you're going to want the answers, and you'll think about those answers, but if you just stay there, then it will continue to overpower you.
But, accept that you'll think about it and it will take up mental real estate for a while, but continue to plan your life without W, go GAL, and take steps towards your healing.
Over time, this mental madness will start dissipating. I can tell you this from my personal experience. There isn't a way around it. Distraction through self-care is the path. Soon enough, you'll see that you don't give a $hit about her answers.
I am sorry, but that's the path. There is no way to circumvent it. I wish it was easier, but it's not. It's really hard, but so is all of this. Take it as part of the package.