IN my first lucid dream, i did a RC, the pinch the nose, to see if i could breath, i did that, and i could. And because that was my first one, i was really exited i me being able to breath while pinching my nose. so i kept doing it. after maybe the fifth time, my nose became a bit stuffy, i could still breath a bit though. And same thing happened today too, while lucid for 15 sec.

Anyone else have that before?