Nested loop help

Hi,

I’ve been trying to implement a small nested loop on my wordpress homepage, local copy only just now(no url)…

What im trying to achieve is this:

check what month it is; ie: current month = 1 //Jan
check what posts have this as a category…
show 5 posts IF there is any, If there’s none,
then move onto the next month(category) and show 5 from that…

code is below..
functions.php

function get_current_month_category()
{
	$thismonth = date("M");
	//$thismonth = "Feb";
	//$thecat = $thismonth;
	//echo $thismonth;
	switch($thismonth) {
		case "Jan" : $thecat = "23";
		case "Feb" : $thecat = "7";
		case "Mar" : $thecat = "8";
		case "Apr" : $thecat = "9";
		case "May" : $thecat = "27";
		case "Jun" : $thecat = "31";
		case "Jul" : $thecat = "24";
		case "Aug" : $thecat = "20";
		case "Sept" : $thecat = "15";
		case "Oct" : $thecat = "16";
		case "Nov" : $thecat = "17";
		case "Dec" : $thecat = "21";
		default : $thecat = "23"; // Jan
	}
	return $thecat;
}

// Code on the Homepage

<div>
<?php
$thismonth = get_current_month_category();
echo "<!-- Current Month Category: " . $thismonth."-->";
$sql = "cat=".$thismonth."&showposts=5&order=ASC";
$my_query = $wpdb->get_results($sql, OBJECT);

if ($my_query): foreach ($my_query as $post): setup_postdata($post);
$do_not_duplicate = $post->ID;
?>
<ul style="position: relative;">
<li>
<h4><a class="continue" href="<?php the_permalink(); ?>">
<?php the_title();?></a></h4>
</li>
<li>
   <strong>Date</strong>:
   <?php echo c2c_get_custom('Event-Day'); ?>/
   <?php echo c2c_get_custom('Event-Month'); ?>  @
   <?php echo c2c_get_custom('Event-Time'); ?>
</li>
</ul>
<?php wp_reset_query(); ?>
<?php endforeach; //endwhile; ?>
<?php else : ?>
<h4>Nothing this Month - Viewing Next Month</h4>
<ul style="position: relative;">
<?php
$nextmonth = get_next_month_category();
$args=array(
	'cat'=>$nextmonth,
	'showposts' => '10',
	'order' => 'ASC'
);
$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) { while ($my_query->have_posts()) : $my_query->the_post();
?>
<li><h4><a class="continue" href="<?php the_permalink(); ?>"><?php the_title();?></a></h4></li>
<li style="position: absolute; top: 0px; right: 5px;">
<strong>Date</strong>:
<?php echo c2c_get_custom('Event-Day'); ?>/
<?php echo c2c_get_custom('Event-Month'); ?>  @
<?php echo c2c_get_custom('Event-Time'); ?>
</li>
<?php endwhile; } ?>
</ul>
<?php endif; ?>
</div>

so basically on the first part of the code, it checks for any posts which belongs to the category ie: Jan, if there is then show 5 posts from that category, if there is none, then check for any posts from the next month(category), if there is is then loop through 5 of them, using a new query?

should i be using the setup_postdata and a new query, or should the query be continued from the first check?

thanks for any help