maxxx,
I understand how your sis feels. Like when I had the stimulation, though scan shows many follicles, I worry whether could most of them be empty. Then when 14 was extracted, I worry that they might not fertilised...then after ET, worry about implantation. Now +ve, also worry about whether could it be just a chemical pregnancy...
I think your sis thinking is normal. She just needs lots of reassurances like what the sisters here have given to us...just take one thing at a time.
blurblur, you must be having sleepness night now that the day is so near? Continue to rest well and keep yourself occupied.