Force a miscarriage or hope for the best??? HELP!

I just went for what was supposed to be my 7 week ultra sound. My hcg levels were supposed to be between 25-30,000, they were only 10,000. Only thing that showed on the US was a sac. They said looks like a blighted ovum. He said I have the choice to have a d&c or get my blood drawn tomorrow with the smallest chance of them doubling. 
What would you do?? Go forward with d&c to just get it over with or torture yourself with another blood draw with a very small chance of a happy ending?
This is also my 3rd pregnancy, the other two both ended in MCs.