Add Any Content Before and After WooCommerce My Account Menu 

<?php
add_action('woocommerce_before_account_navigation', 'misha_some_content_before');
function misha_some_content_before(){
	echo 'blah blah blah before';
}

add_action('woocommerce_after_account_navigation', 'misha_some_content_after');
function misha_some_content_after(){
	?>
	<p>blah blah blah after</p>
	<?php
}