Yea I had the same concern now I'm 20 weeks pregnant and everything looks good. My asthma specialist told me that albuterol categorized as C but she also said taking care of my asthma is better than having an asthma attack where it would actually affect the baby.
What I did in the beginning was use saline inhalations 2 to 3 times a day and albuterol inhaler only when needed not straight in a row like Iike before I was pregnant. Till this day I try to stay away from things that trigger my asthma and only take albuterol as needed and rest.Basically what I'm trying to say is that not taking care of your asthma is worse than ignoring it because (you would know) leaving asthma alone will only get worse and worse and you'll end up needing steroids which you wouldn't want to do. I hope I helped you out in some way
and don't forget to talk to an asthma specialist he/she can probably help you out.