My situation is a bit different, but my dd has only fed from my right breast since 7 months of age, so about the last 6 weeks. This unfortunately was not my choice. She's always hated that side (I had a piercing in there when I was younger so don't
know if that's affected it). She just started refusing a whole feed, then would only feed for a minute, then just flat out refused. Initially I was pumping that side, then just expressing a tiny bit off the top, then twice a day in the shower, now nothing. No issues with mastitis or blocked ducts, but like I said different situation. Very much goes to show supply in demand but it would be harder if prone to blocked ducts