surgery revealed 3 types of cancer!

In February, I was diagnosed with IDC and DCIS. I think that means two types of cancer. I was triple positive (all 99%), Stage IIIA, grade 3.

Due to large size of 6 cm, I had neoadjunct TCHP treatment then mastectomy. The tumor seemed to shrink some, but never went away. My chemo oncologist kept stating it didn't feel like the typical lump and kept thinking what was left was a fatty tumor under the cancer.

Today my surgeon called to tell me the path report. One lymph node (sentinel) still had dead cancer cells in it, and she removed a total of 13 lymph nodes. She said the path report revealed I had IDC, DCIS, AND Lobular cancer. Three types. In addition, all three came back HER -. She said the HER + could have changed, or could have been resolved with the TCHP, and the other cancers weren't picked up because they were behind the biopsy spot. In addition, the HER - stuff would not respond to the chemo treatment I was on. She said one tumor was still over 6 cm, and another one had precancerous cells in it and was 10 cm. What?

Rads still a requirement, but won't know chemo next steps (if any) until I meet with chemo doc Sept 13. I was supposed to have Herceptin/Perjeta if cancer was gone and HER+, or change to Kadcyla if HER- and cancer still there. Now who knows!!

How does someone get 3 different types of breast cancers???? Has anyone heard of this?