Upon researching this finding further, I decided to head to a therapist. After the first session, she diagnosed me with both PPD and PPA (postpartum anxiety, which is also not talked about nearly enough) and suggested I talk to my doctor about getting a prescription for meds to help while we continued with talk therapy.

Unfortunately, it took longer for it to lift from our marriage. The effects of my PPD on my husband have taken years to heal and fade. Still, there are times when he struggles with wrapping his brain around my rage being an effect of an illness as opposed to me just having been a terrible person.
We must speak about this. It's a silent symptom not because it doesn't present itself, but because we're more ashamed of it than we are of the other symptoms...and that's saying something, since PPD is still seen as shameful, thus we're silent about it. If you're feeling rage during the postpartum period, you are not alone. I am here as a testament to that. I am also here to tell you that there is help. You are not a bad person, you can get relief, you are not being judged.
I ask you to share this far and wide. I ask this not as a means of self-promotion, but in effort to spread the word, to get it out there to that one person who is on the brink of destruction because she doesn't know what she doesn't know. Help her. You can help her.