A good start would be to look in a full length mirror with your clothes off. Look closely at the mid-section while attempting to stand straight and "see" if your hip points appear to be exactly equal in eight.

Most people are not symmetrical. Often the pelvis (hips) tips lower or higher to one side. Many times one leg either extends or otherwise is longer than the other.

My perspective (and experience) suggests you don't know what you are doing -see professionals for evaluation.