Marie Davis, The pain, redness, swelling certainly sound like plugged ducts, not yet mastitis but certainly could progress to this. The "milk clots" that are large and slimy (oily?) and evenly distrubuted throughout the milk and dissolve when you rotate the bottle - could this be fat globules? Like oil mixed with water? Why this is only on the one side now I don't know. Let us know the outcome. Laurie Wheeler, Rnc, Mn, Ibclc Violet Louisiana