Can\'t wait for ultrasound!

My next ultrasound is on Thursday, and I'm very anxious.  I want to see their little heartbeats so badly!  I had a little spotting over the weekend and it had me a little worried, but the RE and some gals on this site say they have had the same thing, and not to worry.  I am trying to take my own advice and not worry unless there is a definite reason to - but it's really hard!  It must be that mother instinct setting in - already worried about the kids! ha!  I will be 7 weeks exactly on Thursday.