Current and next month posts

try this query_post for up to 3 posts for the current month:

$current_year = date('Y');
$current_month = date('m');
$args = array(
    'year'     => $current_year,
    'monthnum' => $current_month,
    'order'    => 'DESC',
    'posts_per_page' => 3
);
query_posts( $args );