I didn’t realize this was so sudden. Or maybe I misunderstood. It’s just awful and overwhelming. Like crandc said, there’s no “way” to go through any of this. Do what you need to do. Lean on people. Break down. Go for walks. Whatever you need to do. Know that time is really the only thing that will make the memories of her be good ones, not sad ones. You will think of her and what she meant to you and be happy again, not overwhelmed with sadness.