Delaying,Delaying,Delaying.Why???

Why delay mum and dad ???Trixie suppose to go to see the vet for injection.but no time gotta delay but why??Just hate it,hate delaying....i hope Trixie is felling OK for delaying.last week we wanted to take her 4 her injection but failed cause our car was tyre punchet !!lol!so we have to take her next week hope its ok!!!