Threatened miscarriage...?

Alexandra
Im so worried.. I broke down hard yesterday! I had blood work done Monday and my levels were in the 2000s and had a repeat yesterday to see if they were rising and they went up a little but didn't double like they should have... bleeding was bad yesterday but fine so far today. There was nothing in the sac on the ultrasound Monday so my ob appointment next Friday I have to get a repeat and see if I'm miscarriage... it a my first pregnancy and I'm 20 Yeats old and absolutely terrified.. :'(