Robitussin DM Cough & Congestion?

Okay y’all, my OB told me I could take this here and there an everything would be fine but I’m still worried as it is Category C.

Normally, I’d just deal with the cough solely with cough drops but I’m coughing so much my sides are sore and baby girl is getting unhappy about it and causing me pain wherever she’s setting at the time I cough or giving me some painful jabs after I cough and i really just need some relief!

With that being said, how many have taken this an everything has actually been okay? Like I said, OB told me I could take it here an there but my worrisome mind is still scared to take it without hearing from others who have🤦🏼‍♀️