I called my RE back after my 3rd beta... and he said that sometimes betas dont quite double. But knowing my level of stress (my third IVF!)... he's asked me to come in for a very early u/s on wednesday itself (instead of next week).
I guess i'd rather they check and see if there's anything there, and how its doing (even if its a very early u/s and so they are not expecting to see a heart beat).
So at least I dont have a week long wait now...

Hope its good news... but after 2 m/c its tough to keep optimistic. Would love some encouraging words...
Anj