Loop in a loop noob

I created a custom post type called ‘profentia’. In this custom post type I created custom fields to hold data. I want each single ‘profentia’ post to display its data as well as the previous 4 post’s data. Currently, all posts display the 5 most recent days of data. How do I tell my new loop to start with the current post and go backwards? Let me know if more info is needed. Thanks in advance 🙂

This is the code I am using for my second loop:

<?php
$my_query = new WP_Query('post_type=profentia', 'showposts=5');
if ( $my_query->have_posts() ) {
while ( $my_query->have_posts() ) {
$my_query->the_post();
?>
<div class="inline-list-data"><?php the_meta(); ?></div><?php
}
}
wp_reset_postdata();
?>