i don't know your age or if people in your family get grey or white hair but this could be a normal age-related change. i don't think that it would likely be due to your stress. i don't know if it will turn your normal color again; i suspect that this will likely be permanent. if you do not like this distinguishing change you can put some hair dye on them. if there are only a few you can pull out the white ones but there is not guarantee that new white ones will grow in its place.
i just started to get white hairs on only one eyebrow. why is this and will it go back to its normal color. i have been going through a stressfull time could that be it.