Dude, your wife is pregnant, even if her fears were NOT fact based I'd say support her. Pregnancy does a number on your mind, and you can't control it. Think of it this way, she's gone into "hyper protective" mode. With her bare hands she'd rip the throat out of someone who threatened that lump inside her. She's trying to make a safe, secure nest, it's not conscious, it's programmed into our DNA.
But yea, google Xenohormones, learn something new. Petroleum by-products are not good for our bodies. Ever wonder why so many dudes are on HRT at such young ages or the age of puberty is going down? (both facts, just look it up)