Breast u/s or blocked duct problems???

That's where we are right now with my diagnosis.  We've moved past the clot in my lungs theory for now.  Has anyone ever had a blocked milk duct?  If so, what were your symptoms? 

Oh and I'm switching from my normal OB to the high risk OB unit.  I feel so much more at ease about them since I don't have any family here and my husband will be in Iraq for the duration of my deployment. 

LO is measuring right on schedule and was getting some major exercise in!  We got to hear the hb too instead of just see it.  VERY cool!