Hello We Moved Quite A Bit The Last Few Years

Hello we moved quite a bit the last few years and I forgot that my son had already got a drapes shot last year, the doctor gave him a booster yesterday that he wasn't due for till 2020. I feel awful and I'm scared, will he be ok? He seems fine, the area he got the shot is s little red and hot but not anything worse than I've seen in the past, please help!