Cough during pregnancy

Megan • Boy mom 👶🏼 and mom to an angel baby! TTC #2

I had a cold almost a month ago and it finally went away! However I have this lingering cough! Lately the cough seems to be getting much worse again! Especially at night and with it being so cold outside! What are safe ways to help get rid of this cough? I’m 30 weeks on Thursday!