HELP!!!

My babygirl was born on 10-16-16 I was breastfeeding her but when she was about 4 days old I stop because my milk was completely gone! I went thru this family problem and some family members think that's why my milk was gone anyways so I gave her formula 3 days ND was pumping during those 3 days until I finally got 3 Oz all day long anyways I decided to take her off formula and since yesterday she's been latch on I can only take her off because I have to run to the restroom but she crys her lungs out nothing can comfort her only me breastfeeding her there is feedings where I can hear her swallowed the milk but there is times where u squeeze my breast and not even a drop of milk comes out what can I do to increase my milk ?? I have other baby's and I'm always alone I have to cook and clean and help with homework and it's becoming impossible to do anything else I never went thru this while I breastfeed my other baby's please please help give me some tips on how to get more milk pleaseeeeeeeee!!! Pleaseeeee !!