This picture I don't like too much because the background is white, you are wearing mostly white, your skin color is light complected, but your hair is black. In this picture there is no balance or even blending between light and dark. If you would have had strawberry red hair and maybe a red first-aid kit lying near you, this picture would have been better. Some lipstick would be nice also.
Otherwise I do like your nurse's outfit, and you are a nice looking girl.