Hello everyone, here's the situation: circumstances force me to go bac…

Hello everyone, here's the situation: circumstances force me to go back to work, I found a job, my daughter is 9 months old soon, parents are ready to look after her, they live on a parallel street. The problem is that she refuses to drink formula, milk is disappearing slowly from stress and lack of sleep. She hangs on my chest all night, I see that she doesn't eat enough every time, but cries when I offer formula. What should I do?