I'm 3 days pp and left bottle is left boob. Right is right boob. I'm not breast feeding at all, strictly pumping and supplementing with formula when need be. Milk hasnt come in yet but my boobs are starting to feel heavier and tighter as of yesterday so I'm assuming itll be soon! Question is, right boob has always been an over achiever (that's almost 1oz) and left is slacking. Is this normal? This is after about a 30 minute session and a couple of let downs. My boobs both feel way softer after pumping and nice a squishy compared to hard and sore. So I figure I'm emptying, but why so little in the left side?? Will it pick up when milk comes in? Any advice? My boobs still feel a little hard up at the top almost near my armpit on the side after pumping, but trust me I always feel relief after pumping and I'm sure you know what I'm talking about. I assumed the hardness is just the ducts and my body getting used to being hit by the brick wall of engorgement.Also how do I know if I'm empty? This was about 30 min but I read 15-20 minutes is plenty but i feel like my right breast could've kept supplying. Am I doing okay?

Just need some reassurance!