I need help!

I've been trying to have a LD since the middle of this summer, but with very little progress. I had an incident where I gained lucidity but then I woke up because I got scared... But I've been working on my dream recall and I can recall about three dreams each night upon wake up. But for some reason I can't have a lucid dream. I never know when I'm dreaming. I don't have any reoccuring dream signs that I can think of.

One thing that I notice is that a lot of times I'll be thinking about something while I'm dosing off and then I'll eventually notice that my thoughts totally wonder off into something that doesn't really make any sense. Is this the beginning of a dream?

Other times I'll seem to wake up and I can't move. But this last time that SP happened to me my bed seemed to shake violently. Is this still SP? Is there anyway that I can use these things to attain lucidity?