My boyfriend hasn't called in two days?

Hey, Okay so, my boyfriend and I have a pretty solid relationship and he normally calls me like three times a day. However in the last two days he has not called once. I called him once last night and he didn't answer, and I haven't tried sense. So here are my questions:

1) Should I call him?

2) What does this mean?
Updates
+1 y
He called. He just left his phone at home and he knew I was working all day yesterday and he didn't want to bother me. So, High Five! We're all good. Thanks for the advice
My boyfriend hasn't called in two days?
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