My chin/jaw but it's crooked, which makes my mouth, chin, and teeth crooked as well. Any suggestion? (photos)

You may have a jaw asymmetry which is corrected by braces and jaw surgery. If the teeth are aligned then you might need just a sliding genioplasty. You would need X-rays and clinical examination. 

Your chin/jaw asymmetry can be treated by a variety of techniques but it depends on which side of your chin/face you like the best and whether you want to go through a complete correction of your bite. If a bite correction is desired then orthodontics and jaw surgery will ultimately be needed. But for just treating the chin asymmetry, it is a question of either a right-sided augmentation or a left-sided reduction? I suspect that a left-sided reduction is desired which can be done with an intraoral bony genioplasty with a left-sided bony wedge removal.

You are quite observant about the irregular growth pattern and certainly you can correct it if it is a concern to you. The lower jaw is asymmetric and the upper jaw typically follows along resulting in the "tilt/slant"to the smile and bite. Correction does require a surgical reorientation to both jaws and is a common procedure. Consult a Maxillofacial surgeon for more information.