I second the humidifier. Neti Pot offers great relief. I also used olive leaf nasal spray, which is safe during pregnancy. Probably have to order it on-line or from a health food store. Please make sure the teas you are drinking are safe during pregnancy too.
My approved medicine list includes Benadryl, Chloraseptic spray and lozenges, Contac, robitussin pe or cf, sudafed, triaminic dm, tylenol cold and sinus, Vicks formula 44d, and claritin :)
Also your can use a humidifer to help with congestion. Drink lots of water because that also helps keep your "secretions" a little looser which helps congestion. Rest, rest, rest. Like the post above said call you MD and request a list of things that you could take. The first trimester is the worst because it is really restricted as to what you can take. Hope you get some relief soon.
There are otc medicines u are aloud to take. Like mucinex dm and tylenol sinus and cold. Call ur ob dr and ask them for a complete list. They will tell u.