Post partum in dads?

kate • Lilo, the baby Nar-maid, born 09-6-17.

My husband and I just had our first child 3.5 weeks ago, and since then he has turned into a different person. We've been married almost 3 years now and together for 5, and in that time he's never been anything but the most supportive, calm, and centered man. During my whole pregnancy he was my rock and my caretaker, massaging my back and feet every single night, anything he could to help me. And now it's like he's a different person. He picks fights all the time over the stupidest things! It's gotten so I'm afraid to talk to him about anything because he just explodes. In all our time together I've heard him yell once, and now he's always yelling at me. My doctor says some men go through their own post partum depression or anxiety after birth; has anyone else ever dealt with this? How are you supposed to handle it and when does it go away? I want to support him while he's going through this but I don't have the first idea how.