Milk milk milk

My baby is 8 months old & 25 lbs. his first 2 months of life, I breastfed/pumped & gave him bottled breastmilk. However, I mostly pumped those 2 months. Every 4 hours I'd pump & get a pretty good supply. I only offered the breast if he was fussy or hard getting down at night. I had postpartum depression & had to be medicated for a few months. During that time I stopped breastfeeding/pumping. I was angry & never slept & just quit it. I still have milk in my breasts, 6 months later. So this week I pulled out my pump & started pumping again. I pumped every time I had a spare minute. & now my supply is starting to grow. I'm so happy! Has anyone ever done anything like this before??