Is my supply decreasing? ??

B17
My son is barely almost one month old...i feed him every 2-4 hours during the day but at night starting from about 9 pm till 9 am i feed on demand usually every 2-5 hours.. I alternate breast so its usually 4-8 hours beyween using the same breast if that makes sense. . (feed at 9 am on left, feed at 11-12 noon on right then back to left at 2-3).... Baby usually eats for about 10 minutes or so each feed.. Sometimes only like 5 minutes... My breasts dont feel engorged like they used to, and the side not being used at that feeding doesn't leak or spray like it used to... Is my supply decreasing?. Im super worried that my son isnt getting enough and its declining or something.....