C.C.
If there is ANY way you'd be willing to drive to Ames, I'd suggest Dr Tim Leeds at Doran Clinic. He is AMAZING and had a wonderful bedside manner. He helped my family through the loss of our first baby, then delivered our second beautiful daughter a year later. For me, anyway, it's worth the drive... however, I'm through having kids, so I don't need to worry about having to drive 30 miles to deliver my baby.
Get it checked out soon, though, OK? Breast lumps of any kind are nothing to fool around with.