Suggest Remedies For Greenish Toe Nail Due To Injury

I smashed the door on my big toe nail, which by the way is only half a toe nail because long ago I ran a marathon and lost my toe nail and it only came back partially. Now I injured it again and there is a dark spot that looks greenish underneath. It is hard to tell because it looks as though it is on the nail bed. also it seems a little raised with a white center and thicker than the rest of the toe nail. My toe nail grew back much thicker after the first time I lost it, just fyi.