Baby keeps moving his arms!

Nita

My son is seven weeks years old and ever since he's been born he just keeps flapping his arms. I understand babies can't control their movements but at night time it's hard to put him to sleep when his arms just go everywhere. It wakes him up if he even scratches his face. I tried swaddling him but all he does is break free or scream his way out of it. When I'm watching give sleep I put him on his stomach I found that's the best way.