You tell us that you were treated with antibiotics for your infection.
I am assuming that you are treated successfully for amoebiasis
You can always be re-tested for that. You were recently treated
with a sulfa
drug.The problem could be antibiotic associated
caused by C.Difficile organism. Your green and black stool
indicates that there may be hidden blood in the stool.
I would recommend that you have your stool checked for the
presence of Toxin A &B. If this is positive, you might need
a different treatment.Talk to your doctor abput this possibility.
Wish you good health.