I counsel bereaved parents (when I'm not on maternity leave) and want to answer your question about 'after' just from what I have learned from my clients.
There is no one way to survive the loss of a child and most people's experience is different in some way.
The best advice I can give you is to acknowledge only what you are faced with in this moment. If there is desperate anguish at the moment, just try to let it be there in your body. If there is terror or rage, also just allow that feeling to sit in your body. Take the feelings as physical sensations happening now and literally breathe into them as you would with any terrible physical pain.
Don't try to think about, take in or accept the whole situation - or attempt to deal with the future - you can't because it isn't here yet. You can only do the part of the journey that you are in. Moment by moment turn towards what you are feeling at the time. Sometimes that will be excrutiating pain, but often you will find relief in simply acknowledging that fact and not adding to the pain by fighting it. Try to gently acknowledge the feelings you have without judging or escaping them. It will take enormous courage to do that sometimes, but I promise you that it will also bring you relief.
RL support from people who have a similar experience will be a lifeline to you if and when you seek it. Unfortunately, most people who haven't experienced that depth of loss will simply run away from your pain (and avoid you) and it can be difficult not to take that personally.
All of the parents I have worked with have eventually found comfort, often in unexpected places and at unexpected times. There will eventually be mornings when you don't wake up with the dread and agony you now feel. Those mornings will probably come without warning but will be completely invaluable to you. And you will discover resources of strength that will enable you to meet the days of unremitting pain.
I wish you and your daughter real peace and many moments of joy together and I am so sorry that you are going through this experience.