Hi,
I am not sure if I missed her age but I would not continue to give her supositories.
My son was born with Hirschsprungs Disease: basically could not produce a bowel movement. He was operated on and is now doing fine today. He is going on 5 yrs. I am telling you this because I consider myself a pretty experienced mom regarding poop. LOL!
Cut down on the sugar. Water water water. You can even water down her milk as she is just starting on milk. Go gradual. Do not take her off breast milk cold turkey.
I give my son children's benefiber everyday or every other depending on how he did poop wise.
Warm baths before bed will calm her.
Give her beans with brown rice, Avocados(very good on her tummy) Apples, pear juice, brocoli, squash etc..
Take her to a Gastroentronologist.
Also ask your Dr. about Miralax.
I know you are not a fan of crying it out but is she is not in pain, or sick...I am afraid I would let her cry it out. It will only last 3 -4 nights. Continue to go in there to reassure her you are there but do not pick her up.
My son did not sleep through the night for a year and half. I worked too and it was complete torture. I would pick him up because I was ALWAYS(and still) worried about him. I babied him big time. My second came and I let her cry it out and they are both amazing sleepers today...making mommy a happy mommy.
Good luck!