Breastfeeding/Pumping

Hi everyone I am wondering if anyone breastfeeds their newborn and also pumps to replace a feed as well ?

My baby is 3 weeks old and I was initially breastfeeding her but due to her higher bili levels I had to do BF and then pump my milk and if it wasn’t enough, then top her up with formula. After her bili levels came down, I went down to just BF and then topping her up with pumped milk.

And now I find sometimes, when my breasts are getting too full etc, Baby is still sleeping etc and I just end up pumping and then giving it to her when she wakes up ?

I worry that she’s not completely emptying my breasts during the breastfeeding and then I worry that I’m creating over supply by pumping too much and now I feel like my breasts get Full and uncomfortable every two hours now.

I’m just still confused by this whole breastfeeding. For people who exclusively breastfed, what do u do when baby sleeps 5 hours at night, wouldn’t u have to pump ? Or wouldn’t it be uncomfortable ? Or would the milk supply just be regulated.

Any advice would be appreciated.

I’m just worried I’ll end up getting mastitis or perhaps I’m creating oversupply with the pumping or undersupply if she’s not draining the breasts fully due to falling asleep at breast etc.