Ultrasound will be on Friday!

So I've been driving myself crazy thinking about how I don't have many pregnancy symptoms, so I called up my nurse today.  I told her about the very faint spotting I had on Thursday and Friday (which has since gone away).  She doesn't seem concerned and stated a couple of possible reasons for it.  I asked if I could have an ultrasound any sooner than Monday and she explaned that they want to make it closer to the seven week mark to make sure they don't miss anything.  They had a 1:00 appointment available on Friday 11/27, so that will hopefully put my mind at ease at least a couple of days sooner!