We recently had to switch pediatricians. I am quite sure my 11 year old twins received Hep B series as infants however when we got their records, this isn't reflected. My older child did have the series and all three saw the same pediatrician at the same practice since birth. School requires proof so they had to receive the series again. Did this hurt them? This morning after shot number 3 (6??) they have stomach pain and severe muscle aches. I have no explanation for why the immunizations aren't shown on early records. Dr. switched from paper records to all electronic about 8 years ago. Could records have been incompletely transferred?