You are missing being pregnant and the process.
So you have to figure out if you just miss that and the feelings of missing it, or if you REALLY want another baby...
You are having "empty nest" feelings.
Because your kids are growing up.
So if you have a #3, and that child grows up, will you then miss being pregnant and the process AGAIN... and then want another baby after that?
It can be endless.
My youngest child is now 4. He is really growing up.
I miss my kids being babies and when they were babies.
But I KNOW, I do not want more kids nor is that a reason to get pregnant again.
I just have to accept that my kids are growing up and yes, you do 'miss' those times. That period of life and of being pregnant.