Should I be worried? ***updated

So my fiancé has been acting not himself ever since I gave birth to our son (about 2 weeks ago). He's been very moody, irritable, and overly sensitive. He started acting more normally so I figured it was just the baby blues and he was getting over it. Today, he went to work and everything was fine. About an hour ago, he texts me and tells me that there's something we need to talk about when he gets home. Here's a copy of the conversation... should I be worried?

☆☆☆Update☆☆☆ So he and my mom don't like each other (very complicated situation) and they've both been trying to make me choose which one I want a relationship with, which is very unfair and has been tearing me apart. I've been trying to make them both happy, but it hasn't worked. My mom has already "lectured" me about how I'm "abandoning my real family" for my fiancé, even though that's not even close to what's happening (They moved to a different state and I didn't wanna go with them). But now my fiancé is starting in on how he feels betrayed because I don't bother fighting with my mom about him anymore. He thinks I'm just not standing up for him and that I don't see him as being as important as the rest of my family. I honestly don't know how to handle the situation ...