Chest cold😱 and flying cross country tomorrow, Help!!

I have to fly across the country tomorrow w my husband (I'm 5wks now) and I heard it should be safe. But Ive been battling a head cold which has moved to super congestion in my chest. I have to go (hubby has a medical issue) but do you have any remedies to help me! I've been drinking tea like its going out of style but am nervous about the travel!