We were doing a major painting project when we were trying to conceive, and we had a large living room, hallway, and entrance area that needed to be done (the bedrooms had been finished, and my hubby did the kitchen when I was away for a weekend for a writer's retreat).
For some reason, Thursday night before the weekend we had designated as "the painting weekend," I looked at my husband and said, "I need to make sure I'm not pregnant before we do this." I'd read how being pregnant and the paint fumes and stuff in the paint just don't mix. I took a pg test, and yep! it was positive.
My husband ended up calling his mother (who loves to paint) who was able to come up for the weekend and help him paint. I left the house and stayed in a hotel. There was no way I was going to jeopardize either myself or my baby. But that's my opinion, and that's what I did. To this day, I still think it was the right decision.