I have a whole pregnancy medicine list at home. When I get home, I'll let you know what's safe :)
My doctor only let me take robitusin cough and chest congestion but it depend on how far along you are, i was in my first trimester, you may be able to take something else if your in your third
If it's allergy related you can take Claritin... Or however it is spelled. If it's cold related really you can only take Tylenol cold and flu. Web MD has a list... Here is the link
http://www.m.webmd.com/baby/guide/taking-medicine-during-pregnancy?page=2