A little googling will reveal that MOST "air freshening" products, in fact, most scented household products and even many toiletries / cosmetics, include harmful products that don't belong in, on, or around living bodies. This is especially important to know if you have children, who will be exposed to those chemicals for their whole lives. (Search "air freshener safety" for a bazillion hits.)
Some of us will reach a threshhold beyond which our bodies' ability to neutralize toxins will be exceeded, resulting symptoms like headaches, nausea, dizziness, mood changes, and worse. Concentration, breathing and sleep will be affected.
This happened to me over 25 years ago, and I've had to be very careful to avoid exposures ever since. As a result, my life is extremely limited, since "scent" is so insanely popular. I've been in group sensitivity testing situations watching the effects of chemicals on children, and it's really sad. A tiny drop of some substance squirted under the tongue can turn a child from calm to frenetic or raging in a matter of minutes. Kids are exposed to WAY more chemicals today than even one generation ago, and we're not designed to handle it.
It sounds like your body is begging you to stay away from these poisons. Other posters have offered some good options. Be careful experimenting with natural scented oils, however, since some of those could affect you, too.