D.W.
Emergen-C is the best thing, even when you are not pregnant. Kids can even drink it. It's best if you only add 4oz water. It tastes similar to flavored seltzer water. I like Raspberry and Pink Lemonade the best. Drink 3-4 a day until it goes away. Wal-Mart is the cheapest place I know of ($9/box). I haven't gotten sick for 2 years, as everyone else does around me.
I personally don't think there's anything wrong with taking zinc or herbal remedies, especially vitamins when you are pregnant. That's ridiculous. I believe you should take more because you are providing for 2 people.