my boyfriend isn't home

My boyfriend got off at 2 usually gets home around 2:40 but here it is 5:19 and he isn't home. I texted him and he sent this really simple reply not saying when he will be home or where he's at just "yeah" because I texted him "baby".. I've called him twice. One time it rang to voicemail second time went straight to voicemail. Here I am laying in bed very angry and not knowing what to do. Please any advice? No history of cheating and we have a very wide communication so this is why I'm so upset.