Game Mechanics: Dead and no lost exp.

[jarlerop]

I just died at lvl 21 and didnt lose any exp. I am sure of this because i was so close to leveling that i would have dinged if i downed that mob.
What happened: Got a necro dot and had to zone. When entering new zone the dot had 2 or 3 ticks left, the last left me at around 7%hp. I then get the message my blood cools.

Then after about 15sec i got the same dot recasted on me and it killed me, but did not take any exp?

I may be a complete noob for not understanding this, but i dont believe there are any necro mobs in south karana, and i certainly didnt see anyone.

http://imageshack.com/a/img829/59/ev14.jpg