An addon can help me to find myself

[farlay]

Oh... no, I lost myself again!

Yeah, I admit that I'm a noob, who often found herself lost in some crowded raids, like in Onyxia 25 when the whelps were up and all the crazy mages started AOE, and when we all hugged together at the face boss in the black temple. It's not really a big problem, as I could always find myself sooner or later, but it could be really annoying that for a few seconds I had no idea where I was standing.

My question is whether there is any add-on that can help you to mark yourself, that mark may only be seen by you, to help you quickly identify your position in a crowded place. I tried to use the Name feature in blizzard options, hence only shows my own name, and nothing else, it doesn’t help much, as the letters are too small.