hi. noted history of gallstones associated with pain. even if you re vegan now, the pain wouldn t go away if the underlying pathology (gallstones) is still there. antibiotics will only decrease the inflammation of your gallbladder but will not dissolve the stones. it is best if you consult with a doctor with urgency, preferably a general surgeon and especially now that the symptom is persistent and bothersome, for physical examination and clinical evaluation. diagnostics and management (medical and surgical) will be directed accordingly. definitive treatment is cholecystectomy (surgical removal of the gallbladder), which could be done laparoscopically (goldstandard) or thru open technique. hope this helps. good day!! ~dr.kaye