Postpartum w/Rage

Is there anyone who is or maybe thinks there suffering from postpartum w/rage? My daughter is almost 16 months old. It seems the smallest things make me impossibly angry. I work a full time job & my husband works night shift, so it’s mostly just me and the little one all the time. I’m exhausted when I come home and my patience are thin. I find it most difficult when my daughter is whiney or just crying incessantly. I love her to death and would never hurt her, but sometimes I lose my cool and yell at her. The guilt I feel afterwards is tremendous. I’m just struggling!