Ok, that's fine, but if you want an induction you need to understand that with a VBAC, you really need to be careful. I think your Ob may have meant induction via ARM (Artificial Rupture of Membranes) and not synctocinon (drip) or prostoglandin gel, to have a drip/gel induction would be almost tempting fate with a VBAC, as the contractions are so much harder on your entire body. If that's what his plan was then he possibly can't break your waters yet if your cervix isn't favourable. If you only have you waters broken to start labour, it is still safe for a VBAC to be induced that way as you body still does it all on it's own. he may of needed you to know by 38wks so it could be booked in.

Ask him on your next appointment if you can be examined and go from there.