This sounds really familiar what used to happen to me. I started feeling more lucid in every dream i had and with it weird stuff started to happen in my dreams. As i started becoming more aware stuff like dream characters attacking, walls caved in, everything went dark, cold and weird looks from DC or something really random started to happen. These caused me to wake up many times in a night.
I dont know what the solution was but they stopped as i learned to be patient with lucid dreaming. I used to be annoyed by lucid dreaming being so short or being too distracted on lucid dream to be doing anything fun. Just being dissapointed in my lucid dreams when i was putting so much effort in them.