I had my 3rd beta today - 21 days past ovulation - it increased 82% (from 862 to 1567) from two days ago. The nurse reassured me this was ok since it still went up a lot. I know that most things say it should double every 2-3 days, but I guess I just want to be an over-achiever. As you can see from the chart below, I'm starting to fall more in line with the HCG levels for a singleton at least according to this one website, FWIW. I am such a nervous nelly!
The good news is that I'm scheduled for my first sonogram on July 27th where they'll check to make sure there is a gestational sac and that it is growing where it is supposed to grow. That day can't come soon enough! AHHH, the agony. This is just one wait after another.