Twinz is right, tylenol is the safest thing.
Cold and sinus mess haven't had any formal testing on their effects on the fetus, so it's not safe to take those. I feel your pain, I've had the flu three times this pregnancy and I'm not even halfway there yet. The best thing to do is find natural ways to beat the symptoms, for example, salt water in your nose for a stuffy nose, cold/hot towels for your head. I hope you feel better soon, get lots of rest!