Am I over reacting or am I right to be frustrated?

So, my SO and I had planned to visit his family early New Year's eve and my family later to watch the ball drop. That way both families are happy and we both get to see everyone. We go to his family's house as planned and everything is great until it's time to go, which is when he proceeds to tell me he isn't ready to leave yet and that I should go to my family's and come back for him. I agreed because the food his family was prepping wasn't ready yet and would probably take another hour or so. So we decided I would come pick him up around 10-10:30pm so we could be with my family as well. I send him a text around 9:30pm making sure he's ready and he says a little longer, I ask how long and her replies he'd let me know.. He never text back saying he was ready, and I didn't see the sense in asking again. I watched the ball drop alone surrounded by my family who are all in relationships. I felt so stupid, here I am 29 weeks pregnant with our child and he doesn't even want to spend New Year's eve with me. Then, to make things worse he never called to say happy new year! So around 1:00am I show up to pick his drink a** up and he doesn't say anything to me the whole ride home. Then when we get home I start unloading the car and he heads inside without helping. To make matters worse he's sitting at the kitchen table when I walk inside calling his family in Mexico to wish them a happy new year..now I'm laying in bed fuming as he's talking the night away to his brothers in Mexico. I don't know if I should be this upset or just take it as it is and let it go. These hormones have me questioning my every move. Help me decide..