You Can't Change the Plan Now

From the time of my second pregnancy to now my doctor has always said that I'd be scheduled for an induction at 38 weeks due to the shoulder dystocia I had with SB. Today, at my 36 week appointment, he changed his mind and said he wouldn't schedule an induction until 39 weeks, despite not only the history of shoulder dystocia but now a history of DVT, being on blood thinners, two losses, high fetal heart rate and a very, very quick birth with QB. I work best when I have a plan and I certainly think it's too late in the game to be changing the plan now. Also, need I remind him that with both SB and QB I went into labor on my own no later than 38wk1d?