Database error – HELP

While entering a new post I tried to edit the title and this caused:

WordPress database error: [Table ‘wp_options’ is marked as crashed and should be repaired]
SELECT option_value FROM wp_options WHERE option_name = ‘widget_text’ LIMIT 1

and

WordPress database error: [Table ‘wp_posts’ is marked as crashed and should be repaired]
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts WHERE 1=1 AND (post_type = ‘post’ AND (post_status = ‘publish’ OR post_status = ‘future’ OR post_status = ‘draft’ OR post_status = ‘private’)) ORDER BY post_date DESC LIMIT 0, 15

I’ve got WP-phpMyAdmin.

My blog’s down. Can anyone help?