I'm still breastfeeding my 4 year old. Yes it has changed my breasts significantly. They went from being rather small and firm with nipples that rarely protruded to becoming larger and with large protruding nipples. Initially they were typically full of milk, so they were "full" looking/feeling. Now that my milk supply is minimal, they are more saggy/floppy- pendulous is probably the best descriptor.  :(   Oh well. I don't know yet if they will change again after I've stopped nursing...  By the way, I'm also 46 years old, so age may well have effected this too, plus I'm sure that genetics plays a role as well. So do recognize that a lot of factors will determine how your breasts change over the course of your lifetime... certainly our bodies do change. Just try to find a lifestyle you enjoy and can feel proud of.