How often are you pumping? It's all supply and demand. If you want more milk in the afternoon/evening I think you pump more. I also think you should try to let the baby latch every time and you should try to do a nurse in. Take the baby to bed and stay there for two days. In your undies and a diaper. And just let her eat.
I'm not sure when the supplementation started but not everyone leaks. It doesn't mean that your milk isn't in. I never leaked. I had an emergency c-section as well and my milk didn't come in for 5days. I never supplemented I just fed him colostrum for those 5 days. And when my milk did come in my breast were never rock hard or engorged or anything.
You are only 8 days out. So it's all totally doable. At what point did you begin to supplement and why? Were you counting diapers? At what point did you think what you made wasn't enough?