Breastfeeding help

FTM and may baby is 10 days old, I had a c section and was in the hospital for 3 days after. During those days she was latching on very good but whenever I pumped I never got anything. But the first note when we got home she literally cried every hour even after I feed her, I broke down cause I knew she probably wasn't getting any milk and we started to give her formula. Now I try to latch her on and she cries. This makes me so sad cause I want to breast feed her but I feel like I'm the bad person making her upset, my husband gets frustrated with me when I give up cause I can't handle seeing her cry like that. But I also don't produce allot of milk. On both Brest Ithe lost I've gotten was 2 oz combined. Don't know what I should do, in a way I want to keep trying to have her latch on, but it stresses me out, and I know that it can lower ur milk supply. I don't know what to do?