Can't Keep My Eyes Open

Law school has caught up with me. After three tests fairly quickly in a row, I am exhausted. I had my most recent test last night, and then I had to attend a dinner tonight. I got home about 9 p.m., hoping to do some housework, but sat down at my computer and got sleepy fairly quickly. I laid down on the sofa and bam! Fell asleep. Just like I have done almost every night. I read an article in the paper a little while ago that said if people are sleep deprived night after night, it might become impossible for them to catch up on sleep. I am doomed.