Mine was bone cry by 12 weeks as well. DD1 was 15 months then. She continued to dry nurse for a while and it hurt so, so bad. I ended up weaning her because of it but I have friends who have persevered through the dry nursing and now tandem nurse.
Oddly, it only hurts really bad for me (once I dried up) on one side. So that side was immediately retired If it had felt like that on both sides, there's no way I would have continued this long.