How?

I was in the waiting room at my doctor office with Kylie and a family walked in with their baby and sat by me. I told them she was almost 3 months, and they told me their baby was just 1 week old. I looked at him bundled up in his car seat, so incredibly tiny, eyes barely open, and then looked at my baby almost filling up her infant seat, smiling at me and looking all around the room and my heart almost broke because in that moment I realized I could hardly remember her ever being that small. How could this happen already? It hasn't even been three months yet! Everyone warns you that this will happen. That time goes by so fast and before you know it your baby is all grown up. I'm getting tears in my eyes just thinking about it and wishing that I could somehow slow time down so that I can have as much time with her as possible. I literally got out my phone in that waiting room and went back through all the pictures on it from when she was just born and studied them. I don't ever want to forget any of this...