Freaking out

I am 19 weeks and have been fighting a horrible cough/sore throat for at least 5 days now. I’ve tried to just push through it by gargling warm salt water/sucking on cough drops, but I cannot sleep at night because of the coughing and pain. I gave in tonight and took Mucinex Fast Action Max. Mucinex is on the approved list of medications while pregnant, but I am so worried something is going to happen to my baby because I took the meds. 😩