Want to change Obgyn because she’s rude

I’m already 30 weeks pregnant and haven’t felt comfortable with her at all, she’s rude, dismissive and doesn’t take my health history serious. I want to change doctors so bad but I’ve heard a lot of clinics don’t take new patients after 20 weeks(I called one today and they didn’t want me)😞 what are the chances that I can change doctor? Does it depend on my medical ? I feel so lost and nervous that no clinic will take me💔 I’m starting to feel a bit depressed. Ladies any advise will really help at the moment. Tyia💕