Sudden increase in supply??

Me

Has anyone else noticed an increase in milk supply after one year? My twins are 13 months and I've been having issues the last few weeks with fullness and leaking all of a sudden. I haven't leaked since they were a couple of months old. I'm not eating any differently, and neither are they from what I can tell. They've been eating food since six months and three meals a day with snacks since nine months.