I think my sons a reincarnation of my grandma.

Okay this sounds insane but here me out. The first thing that makes me think this is my son and my grandma have the same birth mark on there lower backs, in the same location according to my mom. My grandma also had a stroke that affected her left side pretty severely and my son has the same thing going on where he can’t use his left arm or hand well. I was showing him pictures of my grandmas mom and brothers and sisters and he said “momma and dada “ when looking at the pictures of her parents..... I was shocked. I said “hello Marlene” to him as a joke and he turned around and said “yes?” Like that was his name. At this point i was freaking out lol. Has anyone ever been there something similar? This is so weird and my mom and boyfriend agrees it’s kinda creepy 😂