Pancho: You are a sweet daddy and concerned, I can see you love your baby and your wife.
I have a baby girl now 1 year old. ( I still breastfeed her) I had problems with crying and sleeping.
We never let her cry , always rocked her and conforted her, but there were times she was awake for 13 times during the night. It was just crazy, and it was very unhealthy for her and for us.
So when we went to the doctor, she asked us if we let her cry, we said no... And she said to my husband this was very bad for baby, and for me. She was always tired and cried more during the day, she send me to read a book, which I've got from the library, and that really changed everything. Now she is sleeping during the night. It was really hard for me at the beggining, but now I see this was the good thing to do for her and for us. Let me get the name of the book.
I read two.. I can't find the title of that one but it was something about healthy sleeping habits. I read this other one that helped too "Guide to your Child's sleep" George H. Cohen.
Your baby needs to cry... you have to let the baby cry, it will take some time and is hard at the beggining but it is very inportant for their health, because they need to learn to sleep by themselves, this will affect how she sleep for the rest of her life, for me it was very hard, but now I have a diferent baby, She just cries because she enjoys to be with mommy, ( I think it happens more with breastfeed babies)
In the books they explain you have to feed the baby check everything is fine, and put the baby in the crib when he or she is very tired but not completely sleep. They need to be still awake and get to sleep there. At the beggining they cry a lot, but in about a week you will have a diferent life. Also is very important to put them to bed at the same time always, and to make them have their naps during the day at the same time too.
I will look again to see if I find the title of the book, and will come back and write it for you.
Believe me I do understand very well .My baby started sleeping well when we did this at about 11 months old!! your baby is younger, and she is already past 6 months, so she doens't need to be feed during the night,. If you and your wife get together in this one, it will soon be over and you will be more rested and happy as your baby and her development too.
So smile!! you can ask your doctor, this is the answer.