Restless baby

Alison

My son will be 5 months on the 18th & he is restless alllll night long. We bed-share, I lay on my side with him resting in my arm and all night long he’s tossing and turning. I thought maybe it was because he was laying in my arm but I laid him in his bassinet & he screamed, so I laid him beside me on his back without holding him & he was doing the same thing. Any advice? I’m tired 😴 🥺