Suggest Treatment For Severe Cough During 38 Weeks Of Pregnancy

I m 38 weeks pregnant and have developed a nasty cough. Started out a few days ago very dry but in the last 24 hours has had minor increase in what s coming up, I have been trying to increase fluids to help me and think maybe this is helping my body to thin musus but the coughing is getting more severe. I started having a very difficult time sleeping last night and lots of discomfort in my rib cage while coughing ( have to hold a pillow tight to decrease pain). What should I do?