Devastated over gender reveal

Hey ladies. I’m 18 weeks and a COMPLETE mess right now. My family, fiancé and I had our gender reveal planned for Thanksgiving. It was supposed to be an exciting time but my fiancé came home today letting me know he was going to have to go BACK to New York this weekend so he could work on Monday.

Normally he’s gone for a week to two weeks so I KNOW he wouldn’t make it in time. I don’t understand why he would plan to be in New York for our big day but wait to tell me this evening. I feel like he’s known that he was going to leave because every time I would mention something about thanksgiving at my parents place, he wouldn’t say anything. He would just kinda get quiet or change the subject. I’m literally sitting in our bedroom in the dark crying my eyes out because this hurts. I text my mom to let her know and she’s doing her best to keep my spirits up but I just can’t help but feel devastated. She says I can dress up and do my hair and still take maternity pictures but he was supposed to be included in ALL of it. If I’m engaged why wouldn’t he be you know? Am I overreacting? What would you ladies do in this situation? What would you say to him? Am I wrong for expecting him to be there?