Was she a twin?

[Neenee Jellybeanie]

Warning - this post has some icky medical detail and describes a threatened miscarriage

I've been thinking about this for a while now. I had a threatened miscarriage with DD. I had very mild cramps and bleeding (light but bright red) that went on for quite a while, over a week from memory. I think twins may be genetic on my mothers side (she may have been a twin herself but the other baby didn't form properly) and there are on my daughters dads side (though my understanding is that twins are only genetic from the mother). I was told I'd had a miscarriage because of a mix up with the hormone tests. I had I think three internal ultrasounds and the final one showed a tiny embryo (and to my knowledge, no signs of a miscarriage such as an empty sac though I'm not sure that there would be?), and I was told that she didn't show up prior because it was too early in the pregnancy. Is it possible/probable that my daughter was actually a twin and I miscarried? The bleeding was relatively light (though I wore a period pad) but I did pass a very, very small clot.

edit: I don't know if this means anything, but before I had the threatened miscarriage I was feeling very fluey and nearly vomiting, having hot flushes etc.

edit again: My mother was definately a twin;

"Sometimes, remnants of the inviable fetus are found in the mother, placenta or surviving twin. This is most likely to occur during the second or third trimester. Although usually the fetus will be partially resorbed and retained, the death of one twin at around 15 - 20 weeks may result in a fetus papyraceous, a tiny paper-like, flattened fetal remnant. A tertoma tumor containing bone, hair, teeth or tissue fragments is also an indication of a Vanishing Twin." This is what happened to my mother when she was born except the tertoma was actually attached to her and had to be surgically removed.