I dont see that less than 2 months is going to make a differance take her back now, I am wondering if you stop telling her to walk on her feet may help sometimes children will do the opposite because its getting some feedback its not going to stop it anyway , so ignore her doing it for the moment ,it could be its getting her attention so she will do it more . In fact try distraction from her feet altogether ..be noncalent like it doesnt matter...Good luck let us know what the Doctor said, .