What if you forget to hold your breath during a mammogram image being taken would that mess up the mammogram? i was breathing and didn't hold breath

Probably ok: Breathing during a mammogram could cause motion blurring. However Mammo techs and radiologists are taught to look out for that and if significant motion is seen a mammogram is typically repeated, either right after the tech checks the images or after a radiologist reviews it.

Breathing could: potentially cause some blurring on the mammogram, but technologists and radiologists are trained to recognize this, and will repeat the image if there is a problem.