Low milk supply, help!


I had my baby girl 9 days ago, she was born with a tounge tie which has no been resolved but not until a week old but I never really “got my milk in”. Due to her tie she never latched properly so was substituted with formula and I’m wondering if that’s why my milk hasn’t really come in. She also feeds all day so about 6 o’clock I am out of milk for her and nothing will come out. I’ve tried pumping as well and can sit there for half an hour on each side and only get about 2ml. Any ideas on what I can do to help as I would prefer not to formula feed her. Also a single mum doing it alone.