Anyone else struggling emotional with this?

We decided that we are done having babies. We're 100% on that. After researching it all, I chose to talk to my ob about having my tubes tied. I now have an appointment set for 10/26 for scheduling the surgery. But the past several weeks I've been getting really bummed when I think about that I'll never have another surprise positive pregnancy test. No more first ultrasounds. No more kicking feet. Hell, even no more morning sickness. And tbh it's really getting to me knowing that our newest munchkin will be the last to ever call my belly home. Am I just hormonal? Am I going crazy? Or is this a normal thing that I'm experiencing as I prepare to close this chapter of my life?