Ask for Material Safety Data Sheets for any products you are considering. We knew to avoid anything 'oil-based' but the product we were sold as an eco friendly alternative was disappointingly odorous. We wondered if we had purchased a faulty batch or applied it incorrectly or in less than ideal conditions. Then we thought to check the MSDS and while it was generally low in the undesirable solvents of other products it did have something, I can't remember the details of what now.

I'm sorry you're experiencing this. Pregnancy increased my sensitivity too. I wish men would take it more seriously. I've read that women tend to have a more acute sense of smell anyway. Canaries down the mine shouldn't be treated as mere nuisances. My frustration at the moment is finding a local furniture manufacturer that doesn't use odorous finishes. Natural timber is not quite so natural when it's coated with something that outgasses badly. I'm starting to think of laminate instead, now that you can get it in low formaldehyde rated E0, not that 0 means completely zero. The people in the stores seem proud to say they use oil-based finishes on timber but I still get a whiff when I open the drawers of my bedside table and I believe that's avoidable if only more people had the will to seek better.

Pure Tung oil could be an option.