Sinus pressure while pregnant

I've had really bad sinus pressure and headaches this past week. No other symptoms besides hip pain. Went to the dr and it's not an infection. Seems to be worse when I stand or bend over so I don't know if it's back related. Nothing helps. I've taken Tylenol, Benadryl, sudafed, used the Nettie pot, steam, pressure points, lymphatic drain massage. Nothing gives me relief.  Anyone experience something similar?