I can not fall asleep

I was so exhausted from yesterday that we all slept in and missed church (I really slept in.) Then I realized my back was really hurting so I layed around ALL day. I even took a nap. So now I can not fall asleep. Please pray I can fall asleep asap and am able to go to work tomorrow. I can not afford to call out and I fear if I do I may lose my job. But I am having a hard time doing stuff with my back. Thanks! -Becky