[ Corporations ] Open Question : Question regarding McDonald's paychecks?

I started working at McDonald's last Monday (the 19th), knowing that my paychecks are transferred to my bank account every other Thursday - that is to say, today. I checked my account balance today and found that the paycheck is considerably smaller that what I expected. My wage is student minimum, so only a fraction should go to taxes, according to some of my relative who've worked at McDonald's and other fast food restaurants. I can only see one possibility: the paycheck was only for the hours I worked between last Monday and this Monday, and the other three days will be included in the next paycheck. Is this possible? If so, is it true? Or did I work 55 hours just to be 200 bucks short?