I had a bad flu a few times during pregnancy... I used the vicks over a bowl of hot water, that helped a little! Also there is a nasal spray that is Cat A, Rhinocort. It's great!! And completely safe, pretty much the only one that is other than saline spray.

Cold and flu stuff are big no no's though unfortunately!
Munch Vit C, and the garlic n horseradish tablets...

Good luck!!!