I agree with the other ladies... if your not comfortable switch. I know quite a few women who have switched even later in the pregnancies... you need to feel taken care of! Good Luck!!
If you can find someone to take you on, then absolutely. You don't need the stress and should feel confident with your OB's office, especially come L&D.
If you feel like you're not being monitored/being taken care of, then I would switch. There are people who have switched at 34 or 35 wks! If you feel that way now and don't switch, how are you going to feel when you go into labor? I say go ahead and make the swtich and the care you deserve! Good Luck!