Low supply! HELP!

My baby is almost a week old and my supply isn’t enough to satisfy her. I have been supplementing with about 1-2 oz of formula throughout the day. I let her feed on demand and use me as a binky and all that. I am currently waiting on a pump to come in the mail from insurance in a couple days.. for now I have a cheaper one. I had this problem with my last daughter as well. I gave up pretty quickly last time. I am reallllllyyyyt wanting to be successful this time. Can anyone who has had a similar situation tell me what you did to increase supply. I would love to start packing some in the freezer as well since I have to go back to work at 8 weeks.

Would love the feedback! Thanks