Pumping Only At Night

Mily

Ive been breastfeeding my 5 week old baby since he was born. I was thinking about starting to pump only at night and breastfeed during the day. Can I pump every 4 hours twice at night? Will it ruin my supply or make me produce more milk than needed? He eats every 2-3 hours for 20 to 30 minutes. Don’t really know how many ounces he’s drinking because like I said I only breastfeed.