I'm off work today?

So I was told yesterday to take Saturday off so I can study.  This morning I get up and clean so I can study the rest of the day. Then I get a call from my boss at work saying no one else can come in and he is in a bind.  So I say ok you want me to come in from 3 PM to 7 PM then come in at 4 AM until 12 PM? He says yeah I know it sucks but we are just in a bind. So I go in because I can't say no and I can't leave someone to work alone. Then at 7PM I say, so what do I do to give my two weeks notice?  He looks at me and hands me a piece of paper to fill out.  Bottom line, today pretty much was supposed to be my day off....and in two weeks...I will have another : )