HELPPP!!! Breastfeeding Question

Le

Hi guys! I recently had my first child on February 10th and breastfeed! The first & second week I had engorged breast and was able to pump up to 15 oz a day. Now, I am never really engorged and I have only been able to pump 2-3 oz a day (I only pumped once a day @ no set time just when I have the time.) I want to know if this is normal and my milk supply will replenish itself or am I doing something wrong and could correct the issue?