Milk supply decrease

Coco

Am I going to lose my milk supply if baby continues to sleep 11 hours straight with no feedings, throughout the night?? I wake up pretty full and I feed baby and pump, and use that milk for baby to practice using a sippy cup..... been three nights he sleeps through the night... I’m still able to nurse every two to three hours, and I THINK he’s getting enough?? How would I know if my milk supply does drop? I’m not sure I’d know 🤔😕