M.H.
My son has sensory processing disorder. He also had a rough time after birth sice he was premie and needed oxygen. He is very picky with what he eats and if he tries something with a texture he is sensitive to he will gag horribly. I would see if you can have her evaluated by an Occupational Therapist who is familiar with the sensory processing. There are things you can do to reduce the sensitivities if this is what it is. At least you would know.