That is very strange. With DD, my midwife discussed my birth plan options with me. I didn't write something up and give it to them. She made notes, but she also recommended that I keep my mind open about meds since things happen.
Well, she was right, since at 35/36 weeks, DD was confirmed breech. I did all the exercises, we tried a version, but her hips were stuck in mine, so I had to have a scheduled c/s.
This is just a personal example to remind you that at 32 weeks you have a while to go before you will need to use the birth plan. I would suggest that if you like the other practitioners well enough, that you stay there (although, honestly, I have heard of plenty of women switching at 32/34 weeks) and trying to give the birth plan to a different practitioner. This time, you might want to just discuss your options, instead of presenting something all typed up. Then, depending on how it goes, you could give they what you wrote. Also, my practice has a mix of OBs and midwives, which sounds similar to yours. If you've only been seeing the OBs, you might want to try an appointment with a midwife, who would be more open to your birth plan. Switching internally happens all the time in my midwife's practice, also.
I agree with you, it would be good to get the information in your chart. To that effort, I would say bring the write-up with you to the hospital, so you can give it to your labor nurse. Making sure DH knows what you want is important, too. Depending on how things go the next couple weeks, the only other option would be for you to hire a doula. You could always ask your practitioner for doula recommendations to see if they are OK with that. But you do have several weeks to sort this all out, so don't feel rushed. It is also probably good that you discovered this about your favorite Dr now, instead of when you are in labor!
GL!