K.I.
I would take them in to see the Dr. again...just to be sure.
My cousin's daughter was sick when she was 5...she had a fever, tired and complained about joint pain in her arms and legs. They took her to the Dr. and it turned out she had a rare disease called "rheumatic fever"...she is fine but had to take penicillin until she was 21.
you just never know...and it doesn't really hurt to get things checked...