Are you trying any techniques to avoid losing the dream and concentration, such as spinning, feeling your senses and looking at your hands???
If you havn't then these may help, if not then keep trying.
Hmmm with the lying in bed part becomming commonplace, it seems similar to habits, which you don't want to think about but always do. I suggest when you think about laying on your bed, try your hardest to think of something else. For example, in real life every time you think of going to bed, or find yourself lying down, think about it and then associate this thought/feeling to something completely unrelated, such as running.

Well keep trying is all i can really say

catchya mate