terrible terrible cramps

Okay ladies.... so I thought I was going to be pregnant... but my period decided to make an apperence 2 days late.... and it's the most painful cramps I've ever had. I have 5 more hours of work (I run a daycare and clean houses). My cramps are so bad I'm sweating. Anyone have any suggestions on easing these cramps. I feel like dying. I have an ice pack on my head right now trying to cool me off