Well if you are going to bed around 2 or 3 and waking up at 7, thats only 4-5 hours of sleep, you do most of your dreaming after 4 1/2 hours of sleep, the easiest time to become lucid is after that because your REM periods last a lot longer and its just easier to become lucid... Try to either go to bed earlier, or sleep a lot longer lets say on the weekends or something. I tend to do most of my lucid dreaming after waking up after 4-6hrs and then going back to sleep with the thoughts of dreaming in my head, i sleep another 4-5hrs usually and in that time I have most of my dreams/lucid dreams...Great way to have really vivid if not lucid dreams.