I have used Sudafed in the past.  From what I have been reading, you don't want to take either of those during the first trimester but they are fine to take once you are past those first 12 weeks.  However, you need to make sure that the ones that you take are not the SA (sustained action) or "multi symptom" forms of the drugs.  Also, I have had congestion myself quite a bit in this pregnancy and have found just regular saline to help clear things up.  Gargling warm salt water can help with the sore throat, and curling up with a steamy cup of water laced with lemon juice and honey to sip is good too.  For sinus pressure, try a warm, damp washcloth lain across your sinus area.  Good luck, I hope that you feel better!