Scared for d&c

So I just had a Drs appt at 14 weeks pregnant . The baby had no heartbeat. We are devastated. This is my second loss but I was much further along this time. Due to the storm this weekend I can't have my d&c until Tuesday. I'm just so nervous. I've never really had surgery besides wisdom teeth and even then I wasn't put under. Any advice? I'm also really worried about why this has happened twice.  Thanks ladies.