Palate expander or not? (photos)

I am 25 yrs old, I have a high arched palate, anterior open bite and mouth protrusion. My tongue doesnt fit into my arch and I get teeth markings. I also have difficulties with certain sounds.I went to the dentist for a palate expander, but she said that would misalign my 2 arches and suggested braces (w extractions).I want to have a normal smile, I want my tongue to fit comfortably inside my mouth and I would do anything if I know it would work. Please help me resolve this, i feel so lost.

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