First Pregnancy and His second Child

Ladies I've been feeling extremely exhausted from work. I work 40 hours a week plus some and I'm on my feet literally all day long. Do you think this is fair talking to me this way? Before I was pregnant yes I did way more. Now I'm more tired so WTF!??!?!?! Now he's not coming to the first ultrasound appointment. I feel like he's pushing me away on purpose because he's scared about his son. His son was very unhappy when he found out he's having a baby brother or sister. He's 10 and spoiled rotten. Help!!!!!!!