Stay with your breath! If your inhales are becoming more predominant than your exhales, you need to change that. Breathe rhythmically and gently. It should not be fast, but it does not have to be overly slow and deep. It isn't as such when we are sleeping, but there needs to be an ease with the breath. Sometimes we think our body is relaxed, but be sure to also check in with your throat, pull the tongue from the palate (roof of the mouth), relax the muscles in and above the palette so their is an openness in the inner space of the head. Bring your awareness through the temples softening and relax along the brow line and forehead. No matter how disconcerting the experience, the awareness of the breath will have a grounding effect and help you through it. Good Luck . . .