it could be your pulse...
I felt my baby very early as well. Everyone says gas but it was the baby being further along and knowing what it feels like :). It could most defineitly be your LO!
Ajjaja i knew it was not possible :p it prob was gas because i did have an upset stomach before bed
In all honesty, I'm sure it was just gas. You are unable to feel a babies heartbeat, and baby is still too little to feel movement.
I highly doubt its the heartbeat just because it would be difficult to feel it. I wont say it'd not movement because it could be depending on which baby this is for you.