My grandfather practiced homeopathy in home but 3 years ago he died. Recently I got severe anal fissure, intense pain and burning sense during motion and bright red blood is coming with stool and after motion bright red blood is coming drop by drop. So I read his homeopathy book and according to my symptoms I select three medicines. 1- Nitric Acid. 2- Ratanhia. 3- Nux voice. Now,my question is what potency and when I shall take these three medicines and how many days I shall take these medicines for complete and permanent cure. Please tell in details.