DON'T PANIC!!!!!! If you truly have a connection then there will be another date! Go ahead, send him the email, then sit back and be patient. Remember, as Doris Day aptly sang..."Whatever will be, will be." These things are difficult to wait through, but I believe in fate. If it is meant to be then he will return your contacts. Do you have ANY idea what his plans were for this week? Was he going away for several days? In my experience, people sense desperation, and it puts pressure on them, so relax. After TG, if he still doesn't contact you, you can always find a reason to "bump" into him to remind him.