Is my infant not sleeping enough?

Rachel

My 13 week old these past week has been fighting sleep like crazy. Sometimes hes upset about it, but most of the time he isn't. During the day he will sleep for about 30-45 mins every 2 hours or so. During the night lately hes been doing good tho! From about 830pm - 330/430/5 am. Should I be concerned and take him to the dr?