DCIS and a Mass?

I had a biopsy on January 16 and was diagnosed with DCIS. After an MRI, a large palpable "mass" was spotted. My surgeon did a ultrasound guided biopsy and a lymph node needle biopsy last Thursday. He was absolutely sure it was invasive cancer and was preparing me to have a port inserted. My results came back as DCIS again. My lymph nodes did not show cancer, but a very small atypical cell. Totally different area for the biopsy with 5-6 samples. He now wants to do a third biopsy because he said he doesn't believe my results. I'm going to have a bi-lateral mastectomy in March regardless because the DCIS area is large and I don't want to deal with this with the other breast down the road. I'm also having a lymph node removal before that to make sure everything is clear. How many biopsies should one have before surgery? Has anyone else gone through this? Does anyone out there have DCIS with a mass they can feel? I swear the mass has gotten larger since the first biopsy.