pump issues 😡😡😡

Got a Hygeia manual pump through wic and it's not drawing out any milk😡😡 I have a class and need to leave milk for the sitter but I'm literally getting just a few drops. And yes I double checked that it's put together properly😡😡 this is so frustrating this is exactly why I dodnt want to work, it's so much easier to give her straight from the boobie! I hate leaving her. I have 2 days to figure out how to get some milk saved for her and just a few days before I start work again. I really need help. Ps I already got a pump though insure but it's in storage and I don't have access to it. Please I'm in desperate need of help or resources