Postpartum

As my baby girl is getting older, my heart breaks more and more each day. Nights are typically me holding her for as long as I can, while I cry at the thought of her changes. She'll be 3 months on the 15th of this month. I'm having a hard time adjusting to her growing. Yes, I know that's something that's inevitable, but I miss my tiny girl. I'm already considering having another baby because of how bad I miss that newborn phase... I was diagnosed with postpartum, and put on meds but I haven't been taking them recently because I thought I was better. Now that I'm experiencing this though, I question whether this is my postpartum coming out or just typical motherhood feelings. Any advice? Please let me know I'm not the only one and what you did to help..