is this normal

Tonight my very pregnant momma tried to grab the 6 month kitten from her last litter by his neck and carry him around like when he was a baby.

Sounds like her mother instincts are kicking in

She had 1 kitten around 3 am, haven't seen & don't feel anymore.

That great, please post photos

Please feel free to ask questions and keep us updated

There can be a delay between kittens, but be observant on how she is acting. If she is quiet and calm, taking care of the kitten, she is normal, if she appears distressed, uncomfortable, or restless, you may have to contact a vet.  My Casper was three months old when the next litter was born and he nursed right along with the newborns!