Enqueue style after shortcodes was parsed

I am busy with a plugin that does a few shortcodes, my problem is in one of the shortcodes I keep track off different values each time the shortcode function gets executed and add them to a global variable.

I would like to be able to use the values stored in the variable in a style in the head. wp_head action does not work as when it execute it seems the shortcodes are yet to be parsed and then the variable is empty.

I have done a workaround where I output jQuery on my plugin class destruct to add the var in a style to the head but obviously this has a delay.

Any idea how I can achieve what I want?

Example code how it works now:

class myPlugin {
  var $styleVar;

  function __construct() {
    add_shortcode('myshortcode', array($this,'my_shortcode'));
  }

  function __destruct() {
     $this->load_head_style();
  }

  function my_shortcode( $atts, $content = '' ) {
    //do shortcode parsing here and add to $stylevar array
  }

  function load_head_style() {
    //output jQuery to enqueue style in head
  }
}
$myPlugin = new myPlugin();