9 month shots??

Tiffany • William Dalas born September 18,2016.💙👶🏼 Teen Mom. 💕 YouTube: Dalas’ Mommy

So my son has an appointment on the 11th to get his 9 month shots. I got a call saying I could get them done today. Today is the 7th. We are moving to Kentucky on the 12th. The last time he got shots I think was May 6th. Is there a certain time frame I have to wait to get his shots done? Should I get them done today?