I was going to ask if you have a vaporiser as well They are good. Even those ones on a stick that you can smell when your nose is outrageously stuffy.
I found taking a panadol did help to clear my head a little, but obviously it doesn't help much with other symptoms. I find warm drinks are soothing.
If it gets worse, it might be worth seeing if the Betadine gargle is suitable for pregnancy?
Hope you're feeling better soon.