There is only one low odour monomer that I'm aware of but its incredibly slow setting so experienced techs find it frustrating to use.
Headaches are not good, if you are using some form of extraction the odours should be relatively minimal, so perhaps its something else....... have you checked your positioning....I used to lean over the nail too much so I was directly above the odours, great for seeing what I was doing not so good for breathing in all the vapours and dust. Also have a look at your shoulder position, are you hunching your shoulders or holding your head at an unusual angle. You may find raising or lowing your chair will help you drop your shoulders and relax a little.
