Papillary breast cancer and reconstruction

Found lump about 8 weeks ago…put off seeing GP for over a month hoping it would go away, but I eventually did and it’s been a rollercoaster since then! Appt at hospital within 2 weeks, suspicious mammogram and ultrasound so biopsy taken. Now just over a week later I’ve just had preliminary results of biopsy and it’s Papillary breast cancer. Confirmed it’s oestrogen positive, one hard lump approx 10-15mm diameter and a couple of other small areas visible on ultrasound in same area (spread of 35mm -50mm) which just feels a little thicker/swollen. No lymph node abnormalities on ultrasound. Waiting HER2 results. Have to go back on 12th Jan when surgeon will set date for surgery or if HER2 positive start chemo. I know that until we know if HER2 positive and any post surgery/sentinel node results back prognosis cannot be confirmed. Surgeon believes it’s curable and I want to believe-but it’s so easy to worry while waiting for confirmation.

I know so many in the same boat but no two journeys are the same. But I have so many questions. I’m a “big girl” (36H) I have been told that mastectomy would be best ( I agree as I have had previous surgery on that breast) and I will take reconstruction, ideally with implant. I understand that implants won’t be H cup to match other boob -  surgeon can reduce other boob at same time for symmetry. I would prefer a smaller size so this is not disagreeable to me. But I am concerned about implications for recovery. Has anyone any experience of this type of surgery?