I have gerd and a ulcer in mouth which is healing since 7-8 month's it isn't painful and I showed to a doctor of 42+ years experience in ent he said its a gerd and now I am worried as the black stools have started happening , I changed my diet since last 3 months to less outside food almost minimal once in a week What should I do now Can u suggest some good doctor of this issue in Bangalore as I am New to Bangalore