Hello, thanks for the query to H.C.M.C.
I would like to say one thing that benzibiotics also we call benzathine penicilline 12 or 24 lac unit
Your's doctor was right as this drug prevent further spread of disease in heart so your's physician was aware of this thing.
Now we come on the point that you have migratory joint pain
from last one yr or so.
is a type of this disease which causes pain in many and different joints.
The initial cause of this disease was streptococcus
bacteria from the throat infection
( 1-2 yrs ago)
Disease is established at now so we have to deal & treat accordingly.
So pl consult a doctor and have a treatment .
Regards Dr. HET