Is this some form of hypnagogia?

I was lying in bed with my eyes closed, repeating to myself something I can no longer remember relating to lucidity and reality checks. Normally, when I close my eyes, I see a huge amount of rapidly moving dots of random colors. After lying there for probably 10-15 minutes, suddenly the dots completely stopped moving. Then I felt a sudden urge to swallow and I did swallow and the dots disappeared. What exactly is this?

yeah that’s an early stage of hypnagogia. after that it should start forming into shapes, images, scenes. the dots probably disappeared due to you moving (swallowing)