Constant arguing

Between the lack of sleep, new adjustments, husband working nights, postpartum healing and this hot weather we cannot seem to stop arguing. Is this postpartum depression? Ever since our baby was born we seem to have shift focus to the baby (which is completely normal) however we are lacking respect toward one another and when I speak it's like he isn't even listening. It's frustrating because he will literally show me something we already talked about or I showed him. I'm not seeing eye to eye on him with somethings and it feels like a sinking hole. Can anyone relate? How can I resolve this? It's not like us at all and I'm feeling completely invisible. I probably will call my doctor but wanted to get some advice here if possible.