I am here again!

I am here again! Yesterday was my routine mammogram and ultrasound date, mammogram back clear, but ultrasound sent me to biopsy directly. I asked the lady what was wrong, she said, an area is suspicious. I am 2 years 3 months after treatment, all my previous routines were mammogram , all back clear. This time, I reported a small lump to MO, so he ordered ultrasound at same time, and arranged the routine 2 months earlier. I am 4 months from last mammogram, but my last ultrasound was more than 2years ago, so I am very scared,, however, I am wondering what is that, I heard mammogram is very sensible to calcification, while ultrasound is sensible to lump. The biopsy is scheduled on May 4, I called my family doctor for ultrasound report which is supposed to be ready by this Friday, but only got April 22 appt, don't know it will be 4a, 4b or 4c?