Quoting Alex.Robins:" he only thing is, I bled after the D&C as expected, for about 2 weeks. A month later I had a period ... [snip!] ... I dont want to take a pregnancy test in case it freaks me out with that little plus sign only to find out its from the twins. "
Oh I see.
There was a girl on here, I can't remember her name, who was still testing positive on HPT months after her abortion. So it seems it's quite possible you could get a false positive. The only way to be sure would be to get a blood test, and if that one is positive, another one to see which way your levels are going.