I've been able to control my dreams since I was a child. So I've been able to experiment a lot, and develop this skill.
Quite often my nightmares act as a stimulus into reaching a lucid state. And I've never had a problem with dream control once lucid. But lately, I'll have a nightmare, and I'll become lucid (or so I think.) I'll attempt dream control, and it will seem to work, accept it actually doesn't. I'm horrible at explaining things.

For example. A nightmare I had a few weeks ago:
I was walking to my car in a dark, abandoned parking lot at night. A few men approached me, grabbed me, and tried forcing me into their truck. I became lucid, gained dream control, and flew away. (Usually at this point, I can use dream control to change the entire environment and direction of the dream. Make the darkness transform into light, make my enemies my friends, et cetera.) Once I flew away, I tried changing the scene of the dream. But before I got to it, one of the men began flying after me. Caught off guard, I tried to use dream control to stop his ability to fly. But it failed horribly.

The nightmare just continued until I woke up. It felt as if I had never had dream control at all, and maybe hadn't even reached lucidity. Is is possible to dream you have dream control? Or am I losing control of my abilities?