I finally had my jaw surgery done

I would like ask questions to the doctors and members here. I need your opinion. I am going to have an orthognathic surgery as my orthodontist told me to see an oral surgeon. I have been wearing braces for 1 year and 11 months now. I have an under bite and crossed bite. My teeth are all lined up but my bite still bad (well, better than before). I have an appointment this coming Sept. 11th. I don’t know if I need a chin reduction because my friends and family tell me that I have a long face. Also, I am very self-conscious about my cheek; I have a very flat face. Now that I lose some weight, the first thing that my friends notice is my face. When I smile I have a sunken cheek and it seems like my chin is pulling it forward, and it create creases around my mouth. I don’t know if I need a cheek implant or not, I been reading about fat transplant. What do I need to ask when I have my consultation with oral surgeon? If I need some things done in my face (like my cheek or chin) do I need to find an Oral Surgeon as well as Plastic Surgeon? Right now, I will be seeing an Oral and Maxillofacial doctor. But I been researching, there is an oral surgeon/plastic surgeon in my area. I live between Orlando and Daytona, Florida. Is there anybody here who has gone through orthognathic surgery around Orlando or Daytona area? My orthognathic surgery is covered by our insurance, but anything else will be out of pocket. I would appreciate any advice and recommendations.
Thank you.