+0
Should it be:

You should go lie down. Or

You should go lay down.

Thanks.
+0
Here's how to learn about lay and lie.

http://grammartips.homestead.com/lie.html

Good luck, John
Comments  
First, you have to realize that lay and lie are different in meaning. Go learn the meanings of those verbs, and

then you'll be able to answer this question in your own.

Good luck!