Hi J.,
I'm going to assume that you have access to a doctor and are receiving prenatal care...
First, call your OB's office and talk to the nurses. They can recommend certain over-the-counter medicines that are safe during pregnancy. You can call to get this information without actually making an appointment. Finding some relief will help you rest and kick the bug.
Second, saline nose spray can help unstuff a nose and is very inexpensive to buy. It's on the aisle with the cold medicines at any pharmacy, drugstore or grocery. It's safe (something you'll be able to use for your baby, even), but a little unpleasant. It does help. If you have a sore throat or cough, a spoonful of honey can help soothe that.
Third, REST and FLUIDS!!! You're young, so you're probably used to staying up late and running to different activities. You should probably cut back until you feel better to let your body heal. And make sure you're drinking as much water as possible. You'll feel a ton better just from that. Hint: I carry a large bottle that holds my daily recommended amount everywhere. It's the only way I can keep track. It gets funny looks from people, but it works!
Feel better soon!