Trouble bringing back milk

Ive been struggling for two weeks to bring back my mom milk. My daughter prefers breast over bottle but I'm not making enough. Three week ago she saw a different doctor and we were criticized, first for her weight gain and length. The Dr even looked at me and said doesn't your daughter look skinny to you? And on top of that he proceeded to say that they can't tell how much she's eating when I breastfeed. During that time I gave her 1 bottle of formula a day on too of breastfeeding. I went home in tears.so for two weeks I breastfed her only at night and gave her a bottle during the day. She only gained 1lb. Now we're seeing a different doctor who supports my breastfeeding but I'm having trouble. I'll make a ton one day and a couple day later she's fussing more because she not getting enough. If you have any tips please share.