Advice

My baby girl is gonna be 7 months on the 2nd. We have breastfed since day one also we’re lucky to donate over 1000 oz, once i got back to work my supply dropped a bit and been pumping atleast 3-5 oz per breast. And now out of no where I’m getting 1-2 oz maybe. I don’t understand how this happens. I drink water all day at work and eat,snack when I can there. I’m on the mini pill have been since my 6 week check up, have yet to have a first period since having baby girl.

Any advice ? Please.