I was also recently diagnosed (26/11/18) and it certainly has been a roller coaster. I had surgery Monday (5/11/18). I had the same issue with my health fund, as I had not been with them the required time. I only had 3 days before surgery to sort this issue out as I had been told they had a 10day turnaround to decide if it was a pre-existing condition. Depends on who you are with and what the process is but i just had to get both my GP and the surgeon to fill out forms from the provider saying that I had never been seen about this previously. I picked mine up as a palpable lump, but had had a normal screening mammogram almost a year previous.
They were great, I noted on my forms when I sent them in that it was urgent with the surgery dates and I got told I was fully covered the next day.
Good luck and hugs xx
