What so ever that you are experiencing now is a by product of your past emotions. Your emotions are a by product of your thoughts. Aligning your thoughts can align your emotions and can lead you to new experiences.
Its only your own experience, a first hand experience that can create new circuit in your brain. Once the new circuit is created, continue to practice the situation that lead to that previous experience. Its through the constant practice that you can sustain the new circuits created in your brain. This will lead to the rejuvenation of your cells. These new cells will then form new patterns and these new cells will lead to the modification of the old cells, that were predisposed to genetic conditions.
You are the creator and yo have the power to create your destiny.