Also my best wishes for you to go forward from here... it is, it will be tough. I feel how much you will mis your twin sis... like a part has been ripped from you.
Now you have to start healing... and also what "Cynthiale" said, cry it out, howl, anything that will help. Also accept that there HAS TO be some time of mourning.
With you in thought, big hug,
Axélle