i fell in a home depot about a week ago. at the time my knee hurt so bad that is all i worried about. the next day my index finger turned blue and throbbed and yet felt numb at the tip, it went away after 2 days . now it turns blue and throbs for a half day or so and turns blue and then all of sudden it goes away. i also feel like there is a hair something annoying me in my upper arm. your thoughts please