Working on a COVID unit as a pregnant nurse

Just wondering, are any of you ladies working on a COVID unit while pregnant? We’ve had several pregnant RNs/techs coworkers who have been kept on “clean” units during their pregnancy, however, my OB says she won’t fill out the required paperwork for me to only work on “clean” units. She says there’s no reason I can’t complete my job duties(which I agree with, I would just like to limit my exposure to covid when possible)