heya
Im 15 as well and have had this since i was 14, its demoralizing and a really hellish thing to have, as im sure you will agree.

Im not sure what is the cause of my dp/dr at all...i really need to find out, same as you, i get the whole dream-like state thing, and definitely the 'wake up in own bed at any minute' thing. also..i agree that it is pretty un-livable..but we've got to do the best we can because...hopefully, like me, you will never lose hope that one day, for a whole day, you will be dp/dr free XD
i am considering seeing someone about it aswell..but im not sure what to say, as i told my regular doctor and she looked at me as if i was barking mad, which made me feel humiliated and my confidence was hit. so im gonna try again soon..keep fighting people!
-Phoebe- xxx