J.L.
When my baby was a newborn she was the same way. It's almost like they are shocked awake and kick suddenly. I only swaddled mine twice i think, and it never worked for her, it seemed like the moment she was out she just wanted to stretch and kick. I even have a pic of her in her NICU basinette with her arms by her head and in the background you can see my bf asleep the same way. =) I also didn't know newborns grunted and squeeked until I had her. They make some weird noises. I would say if she's not crying in pain or making a painful face she is probably fine. I always would press on my baby's tummy and if it was gas pains she would let me know because it didn't feel too good. If nothing happened I knew she was just kicking to kick. Good Luck!