I havent talked to my bf in 4 days?

We've been together for 9 months , we didnt fight nor were we on bad terms. He went to visit his grandparents for 2 weeks called and txted me everyday. The day he came back he called me before he got on the plane said he loved me and couldn't wait to see me. Fast forward to thursday and he still hasn't called his phone rings 2 and goes to voicemail no matter wat fone i use. He hasnt been on fb nothing should I call his job or wait a couple more days?