Should i call my boyfriend or wait ?

my boyfriend and i have been dating for almost three months we meet two years ago and hadnt told one another how we truly felt about each other until we started to date. We use to talk on the phone everyday for at least a hour. However he hasnt contacted me since saturday night when we said he would call me the next day and never had. I dont know if i did something or if hes okay im truly stumped. Hes never gone this long without contacted me. He had mentioned that he was starting a new construction job and that hed be busting his butt on it but still i dont see whym he wouldnt give me a five mintue phone call