My boobs are letting me down

So the first 2 weeks of my daughter’s life I tried nursing...she would nurse for hours at a time because she would sleep and nurse which I found out was because I wasn’t making a lot of milk so she was getting bored. Because of this she’s need to supplement with formula.

I decided to keep track and make sure she was getting enough, to pump and give her a bottle. The first week I was able to pump 5-6 oz each pump.

Over the past few weeks my supply is lowering. Now at a 30 min pumping session I can only pump 2-3 oz.

It makes me sad that by body doesn’t seem to wanna be on the same page