Have u tried steam vaporisers for some sinus relief and cleansing? If u don't have one then u can always pour boiling water into a shallow bucket/lge bowl, put some eucalyptus or lavender oil in (just check what oils are safe in pg with chemist) and hold a towel over u and bowl taking in deep breaths of the steam. Just be careful not to overheat
Just after I found out I was pg I stumbled across something which said you eucalyptus oil was a no no? I freaked a little because had used eucalyptus oil for DH for exactly the above. Someone may be able to confirm this?