Wow--you have summed up my thoughts and feelings perfectly.  I have one precious little girl who I struggled to have.  She turned three in December.  We struggled so to have her....and she was our lucky embyo - the one who fought to survive and bring me a joy like I have never known.  She will be my only....right after she turned one I discovered a lump in my abdominal wall.  Yes, you guessed, cancer.  A rare form too.  I am fine now....last CT scan was clear and hopefully the upcoming scan in May will be as well.
She is truly our miracle...as well as our only miracle.  I don't ever forget that, even on the days that are really tough.
She is loved so very much...and yes, she still sleeps with me.  I am in no rush to change it either.  
I'm not sure I love her more than parents who have not had to struggle to have children....but maybe I do.  And that won't change!