Oversupply

Block feeding. But I'd be really cautious about it since your early in establishing supply.... like don't do it for more than a day.

You can also use cabbage leaves to relieve the swelling ....again not more than 20 mins at a time! Keep in the fridge for extra relief.

https://laleche.org.uk/too-much-milk-and-oversupply/

I had pumped too early too and ended up with very engorged breasts and clogged ducts as baby wasn’t properly emptying them each feed.
To help baby latch on you can do reverse pressure softening and hand express a little till you feel more comfortable. Don’t use the pump anymore.

It won’t drastically affect your supply and will hopefully gradually go back to normal. Although in the first 6 weeks as your body is still getting used to producing the milk you feel extremely full, leaking etc quite often. It does go normal afterwards.

A LC told me to stop pumping and to ice after every feed. It helped tremendously after a day or 2 of consistently icing.

Stop pumping
Hand express enough out to feel comfortable and your body will adjust. No need to resort to block feeding at this stage but you might want to do that with the help of an ibclc certified lactation consultant if you don't see an improvement
Ibuprofen can reduce swelling linked to engorgement
Do lymphatic massage and use ice packs

Stop pumping and when your breasts are too full for baby to latch just hand express just enough to where they aren’t so engorged so baby can latch. Your supply eventually will regulate based on what you do the first couple months

I did this becuase my LO wasn’t feeding properly so I expressed and bottled the milk and she got Breastmilk but out of a bottle every other feed for a week but when it wasn’t quick enough it’s just pure bottled breast milk for my LO now