Hi there and welcome!!
I had some spotting with my ds at around week 6 which lasted about 2 or 3 days, and that was it. Then with this pregnancy, I was horrified to begin spotting around week 10. It only lasted 1 day, but it still had me worried sick, and then I spotted off and on until about week 12 or 13.
Nothing ever came of it, they did ultrasounds and couldn't find what it was. I'm now 25 weeks along, and I haven't had any more.
If you notice it after intercourse, that could be a possible cause... The cervix is so much more sensitive during pregnancy (and with some, more than others), so even the slightest irritation can cause spotting.. Just a thought! Good luck!!!