T is right, it only takes one. Lots and lots of girls have gotten a BFP with low numbers. Try not to stress about it, that will only do you harm, and wait until your next check

__________________
Me (39) and DH (35) married Oct. 2005

TTC #1 since Jan. 2006
3 IUIs with Clomid - all BFN
IVF Cycle #1 - BFP but beta only 35 (chemical pregnancy)
IVF Cycle #2 - BFN
IVF Cycle #3 - FET - embabies didn't survive the thaw

July 2008 - signed up with adoption agency
Sept/Oct 2008 - Home Study in progress

November 15th is National Adoption Day!!