let down feeling (lactation feeling) 12DPO

Elise
So I started having a let down feeling sometime last week. And since the beginning of this week I actually have milk or what looks like milk coming out!! I haven't breastfed in over 4 years and this has never happened! I was supposed to get AF this week but hasn't come. Anyone else ever had this happen to? I've been taking tests and am seeing vfl.