Anyone have asthma and using an inhaler?

Brittany • Mommy to a wonderful 12yr old boy, 9yr old boy 7yr old girl 6yr old girl and 3yr old girl. Due March 11th 2023 with a boy.
I have asthma and woke up this morning really sick and it always gets worse when I am sick. I've been able to just take my singular and not use my inhalers cuz they are class C my OB told me to use them if I need to cuz if I can't breath the baby can't. any one use an inhaler and it not effect the baby? I'm going to my PCP 2morro.