Mamogram

My 1st mamogram and this is certainly not how I wanted to do my 1st mamogram but it was important and need to get done.  I also had an ultrasound.  The doctor was really upset.  I was really confused.  She asked me what exactly happened yesterday.  I told her that I had a needle extraction.  She said that unfortunately, the doctor who did the needle extraction did it blindly.   Well, he felt the lump and went in with the needle.  Well, she said by doing this he obstructed the entire area so she can not tell from the ultra sound where my actual lump was.  So I have to come back in a week.  She gave me some cold compresses to put on my chest to heal it.  I had no idea this would happen.  I'm not a doctor how would I know that he would do more damage than good to me?  I'm so upset right now and I can't believe I have to wait a week and come back to get another ultra sound.