i guess what you meant was RHEUMATIC FEVER
and the treatment you are taking is post surgical chemotherapy
it looks like you are having a delayed hypersensitivity
reaction to the drug molecules.. its common with this type of regimen . kindly consult your doc and ask him to change the drug profile if possible..
NOTe: these reactions in 90% of cases disappear once you have stopped taking the durg after COMPLETING the treatment course