L.,
I'm sorry to say that it is not very encouraging to hear that your hcg levels are declining. But, only time and tests will tell you what is happening, so get that done to ease your mind.
I just wanted to write something to you that is actually part of my response to another mother-to-be on this board. It's never easy to go through a miscarriage both physically and emotionally, but here's a bit of encouragement from my experience:
"As an aside, in March of 2003, I lost a baby at 12 weeks. I did miscarry, and the sonographer said that the development she could see was not normal. Of course, it broke our hearts that all of this happened. In July of the same year, I became pregnant again, and we always marvel at the fact that had this miscarriage not occurred, we wouldn't have our Brycie. We don't know who we missed out on having, but we cannot fathom not having him."
Best wishes and my thoughts are with you.
B.