Last pregnancy, smells sent me over the edge. Nearly everything! So, in desperation one day, while washing dishes, I spotted my Basil plant in the window nearby. I grabbed a leaf, ripped in half- and brace yourselves- shoved it up each nostril. It looked rediuculous, but worked well. For going out in public, I filled a tiny amber jar with some crushed basil and sniffed it when I felt ill.
Sea Bands worked well for general Nausea, but I literally had to be near the bathroom when I took them off.