Mama, congrats sa baby! Para sa ganitong tanong, lalo na ngayon na pregnant ka, please check with your OB muna bago gumamit ng kahit anong inhalant or product, okay? They'll know exactly what's safe for you at baby right now.
In the meantime, a few of us mums swear by simple steam inhalation or saline nasal drops, no chemicals, para ma-clear ang sinus mo. Pero definitely consult your doctor first, ha! Take care, mommy.