I’m so sorry for your sad news, alice.
I’m so sorry to hear that, Alice. Stay strong - you and your family will get through this.
I’m so sorry to hear about your dad, alice. Take care of yourself, too.
It’s indisputable that your life sucks right now (I’m thrilled you have a happy healthy son, but infant care and exclusive breastfeeding ain’t easy or fun a lot of the time).
Echoing what others have said about situational depression. Most of my depression and anxiety were caused by shitty circumstances mostly out of my control (my dad was dying/in a coma/paralyzed/severely physically and mentally disabled, we had no money for anything, my mom screamed at me and slapped me around every day and I spent a lot of time trying to protect my younger siblings from her, I hated going to school, and I was too miserable to eat much of anything which made me feel even worse, FWIW). But seeing a therapist and eventually going on medications for a couple years really helped me handle both the shit situation and my negative emotions about being stuck in a hellish environment. If you feel like you need some help with what life is throwing at you (and you can afford counseling), don’t pass on it just because you don’t have typical PPD or because you’re managing to barely hang onto your sanity with your fingernails.