So I found out I had thyroid cancer when my daughter was 4 months old. I stop breastfeeding at 5…

So I found out I had thyroid cancer when my daughter was 4 months old. I stop breastfeeding at 5 months old because I just got so sick that I was only getting 1oz out of each boob. Now that everything great again I am leaking and my boobs are full.... I know I am producing more than 1oz out of each boob now. Is it just because my body got healthy again? What should I do about this milk? Help?