I spotted after an US with DS1 (crinone combined with transvag US irritated things in there). It was not much. Just a little for a day or two IIRC.
With DS2 I had a dating US around 8-9 weeks and they saw a subchorionic hematoma on the US. They told me I might spot a bit, and I did about a week later. It was fine in the end, but I was worried at the time.
SCH is not uncommon and some women bleed *heavily*. Thankfully, most of the time the pregnancy continues just fine.
Hopefully everything will be a-OK.
Mama to DS-2004
DD-2006
and a new addition-ds born march 2010