This is attorney Bill answering your copyright and intellectual property question today.
The US Federal law provides protection for the original creative works of all authors.
So , the fact that you haven't registered does not conclude that you aren't afforded any protective rights in law.
However down the road in case of a copyright violation it is more important to have your copyrighted work registered with the United States Copyright office, this would give you a statutory right in damages.
Without registration you aren't automatically entitled to compensation should someone use your poetry.
To register, the cost online is just $35 or about $100 for a written application.
Here is the link for registration and fees schedule: https://www.copyright.gov/document.html
WE ARE HERE TO HELP
IN RETURN WE COUNT ON POSITIVE RATING
PLEASE RATE BEFORE EXITING, THIS GIVES ME A CREDIT