Baby's 2 month appointment

So I tried scheduling my baby's 2 month appointment for his shots and for him to get an ultrasound on his hips because of being breech and me having a c-section, just making sure they are aligned right. But they aren't able to get me in until he's 3 months? Does this sounds strange? Anyone else's baby get their first shots later then 2 months.... I'm worried this will mess up all of his other shots