Thank you for your query,
As your child developed severe joint pains
in knees , elbows and ankles with limping after a streptococcal sore throat
, my first concern is to rule out the acute rheumatic fever
by investigating her with ESR, CRP, ASO titre, ECG, 2D Echo and a throat culture
As acute rheumatic fever is associated with the development of acute and chronic cardiac complications and long term penicillin prophylaxis to prevent these complications is available, this should be ruled out by doing appropriate evaluation.
Consult your Pediatrician
and discuss with him and if needed cardiologist referral.
Hope I have answered your query.