Hi there
My cancer was also lobular and quite big at5.5cm ( not picked up on mammogram , I found a lump).
my Dr said it’s harder to get clear margins on lobular as it is like a spider web rather than a neat lump .
I decided to have a mastectomy straight up and it was the right decision as when he operated it was spread through my breast right up to my top of breast.
Everyone is different so it’s hard to give you the right advice but I agree with what someone said above , because you are in shock following the diagnosis ;( I felt like I was looking down on myself out of body when my GP told me it was cancer ) it is really helpful to have someone with you at those early medicals - my hubby was great.
The other thing is to a certain extent you need to trust what your Drs are telling you - we have a world class medical system in Australia and whether you are in the public or private system, you will get great cate in your breast cancer journey.
All the best.🌺