I missed a day of work without notice, what should I do to make it up?? Please help ;(?

I feel soooo horrible. I've only been working at this fast food place for a few weeks now. The thing is that I don't get much hours. At the most, I've been given 10 hours a week, and at for two weeks I haven't gotten a single hour. I keep calling in to check up on my schedule. They always say call in again on this day or that day since I've gotten nothing. Plus, my boss makes the schedule so complicated. Sometimes he makes it for the next two days, and sometimes he doesn't even have the schedule out for the next day so we have to call in during evening to check if we're scheduled. He doesn't do it week by week. Anyway, I was supposed to call in on Tuesday. But I didn't, no excuse there. I didn't call in on Wednesday or Thursday. But I went during night time on Thursday to pick up my check and it just so ends up that I was scheduled to work on Thursday. So basically, I missed my opportunity to make more cash, gain experience, and a chance to shine my skills. What a dummie I am. I haven't called and talked to my boss at all yet. So how do I make it up to him?? I missed work with no excuse, and no notice at all.