Well I had my surgery at 51, so no breastfeeding going on for me.
But I think it's awesome you were able to do this.
To the poster who wants to wean .... my youngest wanted to bf forever. Of course, she doesn't remember that now. Heh. But at the time...
What I did was to start to lay the groundwork by bringing home books on weaning and talking about when she would no longer get nursies. Then, I started to limit her.
She was older, so talking worked, but with a 3 year old, probably distraction would work better. (Not that talking doesn't help too.)
Find something else to do when you sit down, such as read a book or play with a lap toy, and, if you are lucky, it will be something they want to do more than nursing. At age 3 it's about comfort and connecting with you more than the milk so just substitute other connecting and comforting activities.
And if you have one like mine who is very determined and very attached to nursing, at some point you may have to set a deadline. But that generally comes later.