Quick question regarding jabs

[Ginnypotter44]

I was sent a letter by our doctors telling me my dd 12 week jabs are due (second dose of immunisations). However when I've rang to make an appointment they are telling me they can't get me in for another 2 weeks. Does it make a difference if she has them late? Or do they need to happen at the 12 week mark to be effective?

I should add that dd is already 14 weeks so we are already 2 weeks behind. She will be at least 16 weeks before she has the second set. Should I be worried?

No it is fine