Ask a doctor (or TWO) what they think about it. I'd just keep asking until I'd get at least one professional opinion that made sense to me!
Our oldest daughter (now 31 w/3 little ones of her own) started 'tripping' over her left foot (it would turn under her) right after she started walking. I asked our family doctor (who also served as our pediatrician at the time) about it, and he felt her ankles and said that IF the tendon (or whatever) on the inside of her foot/ankle was tight/short and MAKING her foot pull in, it would need some kind of therapy or treatment, but the tendon (or whatever) on the OUTSIDE of her ankle/foot was simply loose/long and he said that as her ankle muscles strengthened, it would take care of itself (and it did).
God bless and good luck!