PPD? Or normal...

So I have two children. One daughter who is 6 and a son who is 2 weeks old. Everything seemed all happy go lucky but towards the end of my pregnancy I was super depressed, angry and tired all the time. Once I brought him home I was okay, until I cried through his first nighttime breastfeeding. I get upset that my husband has freedom and I feel like I don't. I feel like I'm a dairy cow at a milking station. I feel like that's all I am. I feel like a horrible mother because I do t produce enough and we supplement. I feel even worse about it when my husband tells me I need to pump more and huffs if I make only a few ounces a day. I get frustrated that I can't feed him enough. I get upset with myself that I can't calm him. He is usually crying to eat more- every hour today! Then I read upsetting stories of ladies who've lost kids and cry. I cry because I can't seem to spend enough time with my daughter. I cry because my son frustrates me. I cry because I feel disgusting. And most of all, I just cry.