Recently we've noticed a horrible smell coming from our bread.  All the bread we have purchased, including hot dog and hamburger buns, have all not just had a moldy, wet, rotten smell, but also tasted just as bad.  The brands have been different and came from different stores. We just moved into a new place and thought it might be something used on our counter tops.  But even moving the bread into the refrigerator didn't improve the situation.  This never happened at our old place. And it's only noticeable to three of us in the home--our oldest daughter is not smelling or tasting anything funny. 
I had similar issues with a horrible chemical smell no matter what brand I purchased.  A friend suggested fresh baked as an alternative. Really simple and it solved my issues. 