Is 20 weeks too late to change drs?

Jennifer

I am a patient of a practice that has like 8 drs. Because you don't know who is on call when you go in to labor they suggest seeing multiple drs. Overall I've been happy but today was my anatomy scan and it was over in 6 minutes. I'm now concerned about the quality of care I'm getting and what could happen at labor. Is it too late to switch practices?