Feeling sad about leaving my baby over night

So I don’t know if I’m silly or just over thinking things but my baby is 9 months old now and me and my partner wanted a night to our selves so he kindly asked his mum (babies grandma) to have baby over night she obviously said yes, but I’m sitting here worrying about it just feeling bad that baby will miss me or cry for me and it’s making me anxious .... is this normal? I leave him for a few hours every now and then but never over night

.... should I snap out of feeling anxious scared and worried ?