Dictionary.com
definitions

You've made your bed, now lie in it

You made a decision and now must accept its consequences.

Note

This expression is commonly used as a response to people who have been complaining about problems they have brought on themselves.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.