Dont know whats going on?

Ok so i currently have a 16 month old who i havent breastfeed since he was about 2 months old. My suppky dropped and i couldnt get it back up so i had to stop. But i still am producing milk its not a lot (well some days) i cant figure out why im still producing ive ask my drs and they done blood work everythings normal, but im just so confusted as to why it hasnt just dried up.

Little back story my first son my milk was completely dried up and gone by the time he was 4 months old. So its why im confused this time around im still producing.

I'm going to a new dr on the 23rd so im definitely going to ask aboutnit as im over a year from not breastfeeding at all

Any suggestions on why im still producing this time time around and i didnt with my first.