need some advice from a mom who's been here.

I have a baby who is breast fed and she was latching like a pro. Well I had to start pumping so I could save up BM for when I go back to work. I pumped GREAT and fed great for about two weeks then all of the sudden my supply dropped and I couldn't pump and I had to start supplementing formula. Well now I was able to get my supply back up but my baby has nipple confusion from the bottle to my nipple and she won't latch anymore and of course I'm still having issues pumping. Like it's taking 2 sessions to get a full ounce but I have milk. I can hand express and when she DOES latch you can hear her gulping so I know she's getting a lot. I feel so hopeless because she hates formula she just cries and cries when I try to give it to her but I can't pump so I'm kind of stuck when I go back to work in two weeks because I only have a few bags of milk stored and she refuses formula. What do I do?! I'm scared she will stop thriving as well as she has been if she stops eating like she used too.