My HCG draws have been every 2 days. Except the 1700 it was drawn the evening of the 1275 draw because I went to the E.R with pain. We saw nuttin on that ultrasound :(
With this pregnancy, my OB did an ultrasound at around 4000. Actually, it was about a week after I hit that number. We saw a heartbeat at that point. If your last scan was at 1700, then this one should give you your answers. I wish you luck and as the others said, please do keep us posted.
Now that your number is 1700, they should be able to see something on the scan. Usually with ectopic the numbers would rise very slowly, your numbers look good, but I don't know how far apart the blood draws were. Good luck to you and please keep us posted.
I think your beta shouold be at least 1200 to see anything...
Good luck tomorrow!