My son is 9 months and had his 6 months immunizations today since he was sick at 6 months, however he received the rotavirus vaccine at his 6 month appointment and it was overlooked today and he received it again. So, he has had the rotavirus vaccine at 2,4,6,and 9 months. Is there anything I need to worry about with him getting an extra dose and that the dose was at 9 months for what I've read it shouldn't be given after 8 months? Just concerned about what an extra dose may do....