Hi, sounds like your surgery is sorted, good luck!! I had ILC diagnosed at xmas, mastectomy plus axillary clearance (one node positive preop, turned out to be 3 post op). Make sure you get the proper exercises for your arm from a physio asap - they're pretty light to start with, but worth it. I wasn't given that info soon enough.
ILC seems to be hard to measure from scans. Post op pathology is most revealing, and will be the decider in what comes next.
I've already got kids, 45, so didn't have to think about fertility, which must be so hard, but sounds like you have a loving supportive husband, keep talking.
Good luck, at least you've got gorgeous Bonnie to keep you smiling. 🐶💕