This cant be happening

I'm only 23 but I've been getting gray hairs since about two years ago.  Lately though I've been having trouble getting the color to 'take'.  I've tried all sorts of clarifying and chelating shampoos but nothing has fixed the problem so far.  This normally wouldn't be such a big deal if only my hair wasn't black.  My gray hairs look white against my normal hair and sticks out like stripes on a zebra.  On another note, I've been using vaseline on my lashes at night since I found out that this might help make my eyelashes grow thicker and longer.  I think it really might be working!  It's hard to tell though and it all might be just my imagination...  Okay, I've got to stop messing around with this blog and actually get some studying done today!  Ahhhh