Hey hun - it's totally normal for your BETAs to keep rising until the mc is complete. With my last loss - I was at 355 or something and when I went 2 days later, it was up to 410 but the baby definitely wasn't growing. My doc said your body will still produce hormones if you are techinically still pregnant but they won't double like they are supposed to. It was hard to get closure though until the numbers were going down. My bleeding was different all 3 times. One, very heavy - lots of clotting, 2nd like a period, 5 days and the last - mild dpotting, few days of bleeding, more spotting. Totally weird.
I'm so sorry honey...