I had blood work done Thursday because of a previous miscarriage. I just found out I'm pregnant and they wanted to make sure my levels are going up. On Thursday they were 450..(I think I'm only about 5 weeks) and they made me repeat it in 48 hours, so on Saturday they took blood again. Today I called and they said it only went up to 700 and ordered an ultrasound for 2 weeks from today. What does this mean and should I be worried? =/