Has anyone had CVS done?

I just had CVS testing done on Friday morning. I've been having the expected brown spotting ever since - I'm 11w5d today - I'm just wondering if anyone has done this, what their experience was. I'm on baby aspirin daily, the Drs knew this, but I wasn't advised to discontinue use prior to the procedure. Trying not to work myself up and get nervous, but, can't really help it.