I'm with Manta Gabi, you just never know, I never had internals, but I had an appt the day before I had Riv and I was convinced I had at least another week to go. Your bub might come tomorrow, your bub might need to bake another 3 weeks - usually our babies and bodies know what they're doing.
All the best for your wait though, it can be tiring I remember.
(interesting to read this info, I'm seriously thinking about induction for our next, if we have another, since we'll live about 50min from dh's work, and I had Si in about 50mins...)