Stopped feeding, stopped leaking, then started leaking again?

Em
My daughter is 4 months old. I breastfed until 2 & 1/2 months, then my milk dried up. I leaked for a week or so. Now I'm 9 weeks pregnant and it's POURING. Not colostrum, actual milk. It completely dried up when I stopped, then started a few days ago. Anybody have this happen before?