Hi there! I am considering doing the same thing! I am 34 weeks along and not completely satisfied with my CNM, who works in a hospital. I mean, she supports most of what I want, but there are just three things that REALLY bother me. I am having a VBAC and they routinely do these two things for VBAC patients: 1.) an intrauterine pressure catheter 2.) internal monitoring, where they stick a probe into my baby's scalp!!
She would also have to artificially breaking my water at 8-9cm or whenever they decide to insert the internal monitors.
Like you, I've been planning to stay at home as long as possible and hoping for an "unplanned" homebirth. My doula is a midwife in training, so I was thinking it would be perfect just to stay home "too long" and have an "oops". But then today I was thinking that maybe I should actually look into switching care to a homebirth midwife, since my doula is only a "midwife in training". So, I ran a search online today and found found a GREAT practice! I just emailed them, telling them about my situation and asking if it's too late in the game to switch to their care.
My heart has been with a homebirth from the start, but there were three things that changed my mind 1.) a comment my dad made. He said, "You aren't gonna try to give birth at home again, are you?" 2.) I had lost faith in licensed midwives, but as my pregnancy went on, I realized that it was just the particular midwife that I chose, not licensed midwives in general. What happened at my birth could have happened with any care provider! If I had been more educated, I would have known not to push when I did. (I attempted a homebirth with my last baby, but transferred to the hospital after pushing for 6 hours without enough progress) 3.) My fear of uterine rupture. The more I researched it though, the more I realized how rare it really is!!
Anyway, just wanted to pipe in and say that you aren't alone! I want to switch too, only 6 weeks from my due date!!
Good luck at let us know what happens!! Oh and as far as a birth tub goes, you can just go buy a cheapo inflatable kiddie pool, which will work just as well. I bought one for my last birth (I wanted a water birth) and it was wonderful to labor in a big pool of warm water!!