Allergies sinus infection medicine

Mom of 2 babies ❤️❤️
So I'm sick as a dog. I called the Obgyn and she told me to get sudafed. I went to the pharmacy and the tech tells me no way if I'm pregnant that he can't give me that if I'm pregnant.  What is going on.  Now I'm at my PCP waiting to see her. Anybody knows what's good for these issues?