I'd be more concerned that it is not rising very fast than that is is low. If the embryo just implanted a couple of days before the beta, it would naturally be low. Will you have a third blood draw tomorrow? It might pick up speed, and then you can relax.
ps -- My IVF clinic considers anything over 5 to be pregnant. It is true that they like to see 25 by day 14, but until you get a drop in number, you are pregnant now.
Thanks Annie. I will have my blood drawn again on Thursday. Am really hoping they see a significant increase by then!
I hope so too. Everyone who wants one, deserves a baby. :)