I Am An 83 Yr Old Person And Underwent CABG

I am an 83 yr old person and underwent CABG in 1986 May by Sir Magdih Yacoob in London. Quite sometime back Angiogram taken had shown blockage in one of the grafts. Because of this I have to take a lot of medicines. List of drugs can be provided should you so desire.
I also have CKD 3 of my Kidneys.I am type 2 diabetes for last 45yrs which is very much under control. Presently I am on small dose of Insulin with tablets.

Present problem is abdominal pain. Pain which starts after food ie after breakfast, lunch and dinner.