I had that before. I didn't have any control, but I was lucid, and I was stuck inside a room with green and yellow tiles. I wasn't aware you could control lucid dreams at the time so I tried to wake up by blinking twice which usually works for me, but I stayed asleep. I tried every method from pinching to ramming my head against the wall but nothing worked. I woke up eventually though, and if you think about it you can't get stuck anyways since you can only sleep so long. So, I think it is possible, but more probable when you don't have any control in the dream world. Since you are here and already know about the control, I think you'd be able to get out.