Katie - great to "see" you back here. I, too, have been on a bit of a hiatus, trying to adjust to well, life.
After Sofia's birth, I purchased a book about ppd - this isn't what I expected. Since dealing with PPD since Henry's birth, I just thought the feelings I have had were normal. And, like you, I was always told how I should feel and made to feel as though my anger, my sadness, my weariness were my own doing.
I just yesterday picked this book back up - and shocked myself that I was waaaay back in the first part of the book. Guess I wasn't ready for too much more.
Know that it takes time to work through it all ... and allow yourself to have good days and bad ones.
I am thrilled to read that you were able to really see the sky and appreciate it all ... those things are still hard for me some days. And wow! Your little man is doing so well!