Last pregnancy (2008) I was given a card listing medicines I could take while pregnant and a couple for congestion were chlor-trimeton, saline spray, and mucinex but triple check on that before taking anything. I know from various lists from various pregnancies that these recommendations change a little from year to year. Saline spray would be safest bet.
We have what sounds like the same thing here. I haven't had a fever and it doesn't appear to have effected my temperatures but my daughter and I have it a lot milder than my baby does.