Should I tell them I’m big?

I just got my BFP today and after some long research, I found an OBGYN with great reviews that I’m interested in. When I call tomorrow to make my first appointment, should I tell them that I’m obese? I’m 5’4 and 280lbs. I’ve heard before that doctors can turn you away for your size and I don’t want to risk that embarrassment buuuut I also don’t really want to tell them over the phone. 🤔😕