Welcome to HCM.
Pain around umbilicus which shifts to right Iliac Fossa
, is typical of Appendicitis
You have not mentioned whether your Stool examination was done prior to starting Metrogyl, because it is the drug of choice in amoebiasis. If you do not have Amoebiasis, metrogyl alone is of little value.
Better get an Ultrasound Study done as well as routine blood test
to rule out infection (Appendicitis), since Total count of WBC of more than 11000 with neutrophilia
is indicative of infection.
Of course a surgeon can also provisionally diagnose appendicitis by eliciting rebound tenderness
at MCBurney's Point.
It is prudent to avoid blind treatment. As far as possible a firm diagnosis supported by investigations is ideal, before starting any treatment, exception being relieving the patient's agony by immediate management of that agony.
Wish you speedy recovery.