A husband leaving, the inability to have children, your heart broken, being alone...my heart cried when I read this. The stories are different, but the outcome is the same. I am living with the same feelings. You have been through much but you must remember, as I have to keep reminding myself, that when you acknowledge the presence of Jesus in your life and within you, you are not alone. It hurts, I know, I still cry at night because my husband left for no reason that he spoke of, and I cannot have children of my own biologically, and I pray every night that the pain will go away, that God will change my circumstance and bring me through this storm that has been raging in my life for two years now. In the meantime, I wait for His plans to manifest in my life, doing what I can do to change myself and be a blessing to others. Doing good for others, whether it is physical, verbal, whatever, can have a great positive impact in your life and spirit.
As for your surgery, I am praying now Father, that as your daughter enters that operating room, that you are there with her every step of the way. That You are guiding the surgeon's hands, all the members of the surgical team are at their best. Assure your daughter, Father, that nothing is impossible with You and that not only will your daughter get through this surgery, she will get through it abundantly better than she was before. Don't lose heart sister. Everything will be fine. Much love.