Would I benefit from a genioplasty or double jaw surgery? (Photos)

Absolutely not, under no circumstances should you get orthognatic (double jaw) surgey, that's over aggressive and non indicated for your case.

You have reasons to fear a witch's chin, you already have a bit if it and once the chin has been moved forward this would be massively aggravated; to prevent this the chin, which is overly sharp now, has to be rounded and widened (to the point, a tad) so that the final outcome is a feminine and cute dome.

You have microgenia, this is small bone developtment at the chin, therefore you need chin augmentation with bone supply (iliac grafting); not a case for sliding genioplasty giving there's nothing to slide, it is primery deficit of bone substance.

Regarding the nose, it is not a bad one for you, you might consider getting the chin done in first instance and then see from there; if you dream of a perky tip and smaller nose then yes, you can get together rhino and genioplasty (aka profileplasty).

Seek the services of a well experienced genioplasty surgeon, you are NOT a case for just a sliding genioplasty, much less for the poorly-outcomed chin implants.

Dear Ana,

Thank you for sharing your photo. From what I can see, the main area for improvement is in the lower third of your face. Your nose and upper jaw appear to be well-positioned, but your lower jaw and chin are somewhat recessed.
The optimal treatment would be a bilateral sagittal split osteotomy (lower jaw advancement), possibly combined with a sliding genioplasty, to bring your lower face into better harmony. This typically requires coordination with orthodontics for the best long-term bite and facial balance.
If you wish to avoid orthodontics and a full jaw procedure, then a sliding genioplasty alone could still improve your profile, though not as dramatically as the combined approach. A skilled surgeon can shape the chin advancement to avoid creating a “witch chin” appearance.
An in-person consultation with a board-certified oral & maxillofacial surgeon or plastic surgeon experienced in orthognathic surgery will allow precise measurements and a tailored plan.

Warmly,

Earl Stephenson, Jr, MD, DDS, MBA
ESJ Aesthetics — “Where Confidence Takes Shape!”