How could i even out my body?

Okay this is the cause of my low self esteem. I've always had a big butt as a kid at 10 ifell and did the splits my left leg got hurt and bruised up bad I'm 18 now and my left leg still gives out on me it aches at times. But the thing is idont know if what happend to me is the cause but my right cheek is bigger and fuller then the left inotice it big time they say u can't notice it if u pay rlly close attention and it ain't a big difference but to me its a huge difference and it sets me back befor ifell they were both even iwould know and eversince it hasn't anymore. Also my left side of my pelvic hurts as well and is sensitive when massage it. Could it be from the fall it didn't let it grow right or what could ido besides surgery to fix it ihavent gotten my leg checked cause everytime igo they say nothings wrong and its been too long to keep affecting me idk just please help