Cough drops? Tea?

[danipoppins]

37 weeks pregnant, head cold has turned into annoying, tickling cough which is driving me bonkers (and making me wonder if one of these times my waters are going to burst with all this coughing).  

Can anyone recommend something soothing for my throat?  I can't do corn, gluten, soy or dairy.  I'm sipping on a cup of hot black tea now, but would prefer something herbal though I'm not sure what it safe/not safe in terms of herbs to address this coughing. 

Thanks!