Someone had posted here or in another forum I read about having trouble with milk. I know someone who went through re-lactation after hospitalization and surgery. Her LO was under 6 month.
She used Fenugreek and power pumping with a high grade pump. The combination of the two allowed her to nurse again. Fenugreek is also found in curries, maple syrup, and other foods.
Consult your doctor before taking any supplements.