What's normal weight loss after birth?

Miri • 7/17/16 8lb13oz and baby boy due 1/2/19!!

After delivery I transported to the ER from birth center because I lost too much blood and kept passing out. I received a few bags of fluid, stayed over night and then went home.

I was 155 before pregnancy, 195lb 4 days before delivering.

Now 7 days after delivering a 8lb14oz baby, I weigh 165

I'm breast feeding if that matters any. Is this normal weight loss after birth?

Midwife didn't seem too concerned...