feeling like a horrible mother...

Little one will be two weeks old on Friday. I feed her every two hours or every two and a half hours. I even set my alarm to wake up to feed her. 
Well, last night.. I must have turned my alarm off and we both just slept! She slept from a little after 12 until 7:30 this morning. I woke up freaking out!!!!! I feel so horrible as in how could I ever do such a thing? I feel so upset and disgusted with myself....