Hi,
I'm very sorry to hear that you are suffering so deeply. But I want to tell you that there is a God and an afterlife, and the spirit of your daughter lives on and you may be reunited with her in the future. I realize there is nothing I can say that will change the fact thay your daughter is no longer present but there are a few things that may help you understand why life can be so hard.
We come into this life in order to learn and develop and nothing that happens here can change the fact that we are all immortal spirits.
I believe in God, but I also believe that the idea that God will protect us from the difficulties of life is a myth invented by religious leaders who wanted to control people. They would say "Do what I say and God will take care of you and if you don't, something bad will happen"
It is very hard to understand why God would allow us to suffer but when we return to the spirit world we see things from a different perspective and understand better.
It might help to consider the person that you were when you were half your present age and compare that to the person you are today.
Now consider the fact that you will continue to live on as a spirit throughout eternity after this earth life is over.
Would you prefer to go through eternity as the person you were at half your age or the person you are now?
Most people would prefer to be the person they are now rather than what they were so long ago. But what made us the way we are now? Do we develop our good qualities from getting everything we want and having an easy life? No. That would make us selfish, spoiled, and shallow. It is the difficulties we overcome and the things we learn from those difficulties that make us what we are and provides us with qualities that we will value throughout our future eternity. The greatest souls develop by overcoming the greatest difficulties.
Does this make it easier when everything is going wrong? Not really. Well, maybe just a little. I'd rather face the difficulties in life knowing that there is some silver lining somewhere even if those benefits are not presently apparent because it gives some purpose to life and seems to make sense out of an existence which can seem so senseless at times.
I have posted some information on the evidence for the afterlife in another post and you may find it helpful:
http://afterlife-knowledge.com/cgi-bin/yabb/YaBB.cgi?num=1226472423/0