If the confirmed diagnosis is Pterygium
,then you need not worry.It is just a non cancerous growth over the conjunctiva
which sometimes progresses over the cornea( central transparent part of the eye). It can be easily removed with a minor excision procedure.
The only thing I am having a second thought is it's incidence in a 14 week old baby. Yellow with red spot may be due to pingeculitis also, Which is also a small localized conjunctival degeneration which gets inflammed.In either case it is curable so let's hope for the best.:)
Do let us know after your direct examination with your eye doctor. Take care.