I have a really big problem..

Oh kay so.. iv'e not had lucid dreams in a while now. I just have ordinary dreams.. And there soo strange. Example: i was sitting on an island, and a big chunk of it Flew off and i grabbed onto it and it flew to another island.. then i cant remember the rest.. and then I was like floating in a volcano. And there was a waterfall of lava, and i kept falling off it, And then appearing back on the bit of floating rock, then falling off it again. The laver acctually Hurt me!!.. and ive had them about giant lorries Flying around my skwl? and rollercoasters falling off things and then fat people bouncing around.. All strange.. These are obviouse dream signs.. peopel say that there dreaming and then suddenly think that this isnt right, I must be dreaming.. Well im not in controll at all, its like when i wake up i think aobut my dream and remember myself in the dream and it all seemed normall to me, then after waking up its not its just completely and utterly strange.. wats going on? why cant i obtain lucidity.. and how can i obtain lucidity in just one night?