Trusting your remedy is important and I have no doubt that your yoga and positive attitude can accomplish much. When it comes to serious conditions like cancer, HIV, Crohn's, Lymes, Hep-C, MRSA, yoga may help as part of an overall protocol that includes diet, lifestyle, etc., but most likely herbs and natural remedies will be necessary to defeat the problem.
Put it this way - I like yoga, but if I were to somehow contract cancer, I am not going to try to beat it with just stretching and flexibility exercises.