Ladies need advice

Okay so my boyfriend said he called me earlier which I wasn't home so I missed his call ... So I text him around 7 something like hey baby Wyd he says nothing chilling I called you earlier and I let him know what I was doing ... So then I tell him to call me and he's like I don't feel like talking right Now just text me so I automatically assume he's with another chick and this is only because of our past and it's just like why can't you call your pregnant girlfriend like its something so simple I kind of cussed him out I'm trying to start our relationship off right with it being a new year and forgetting about the past and this and that but why does he have to make it hard like I don't understand why he couldn't call me ... Am I overreacting ?