Given that you are taking some "water tablet" to help with the lymphoedema, you have a greater predisposition to developing kidney stone.
Also being on opoids (Hydrocodone), you can develop abdominal pain from constipation, as a side effect. So too is the possibility of developing spasm of the gall bladder (biliary colic) from the use of this medication.
You will need to see the doctor or go to your emergency department, if you have the pain. A thorough physical examination and detailed history will be necessary.