If you're on a server, I'd assume you went to The End after someone else did. If someone uses one End Portal, and you use another after them, the end point for your new portal will be relative distance from the other one, which would be near the center. AKA you'll spawn in the middle of nowhere.
Basically, fly toward 0 0.
I'm pretty sure I was the first, its just me and my friend on the server right now, though I suppose someone else could have joined as the ip was previously posted before it was a tekkit server.
god loving damnit I found an island in the ned and was setting a waypoint when the dragon swooped down and killed me.
I had enough dark matter to make another swiftwolf ring so I ran to the nether to get a bucket of lava. I died about 10 times in the nether before getting out with the bucket, then I went back to the end got my stuff and was instantly killed by the dragon again. I don't have anymore darkmatter now
if my friend was home he could just op me so I can get my stuff real quick, because of how ridiculous this is, but he's not.
at least that stuff shouldn't despawn while I'm waiting to get more dark matter to make another ring.