Asked: Strange sleeping experience?

I woke up quite early this morning and tried going back to sleep because I was still quite tired. For a while I was lying still until I reached a state where I could feel this sort of tingling over my body and when I tried to move I couldn't. So I opened my eyes and I started to get this extreme buzzing sound in my ear. It was like I was sleeping but I was aware that I was sleeping. It was sort of scary because all of a sudden there were many thoughts in my head and my heart felt like it was beating faster. Still, at the same time it was sort of exciting. I was only in that state for what seemed like 5 minutes but when I 'woke up' I was completely energized.

I did a bit of research on lucid dreaming but I don't know if that's what I was doing because I wasn't actually dreaming. I was aware of what was around me so it was like I wasn't really sleeping and wasn't really awake. So I was just wondering am I going crazy or is there a name for what this is?