Should I Be Worried About This?

So last week my boyfriend left to go to the beach, and he promised he'd text and call me everyday and send as much pictures as he can. But it's the end of the week, and the only communication I've gotten was in the beginning of the week when he was on his way there. Don't get me wrong, I want him to enjoy the beach and relaxing, but I text him in the mornings and before I go to bed, telling him to text back if he can, but he never does. Before he left he said he's gonna be back Sunday, it's Friday and I still haven't heard from him yet. Should I be worried, or should I just cool it and relax? Thanks. :-)