Can't cross left hands fingers?

Noval cake

My 12 year old daughter first told me that her pinkie was numb on her left hand and about 4 days later (today) her pinkie is still numb and she cant cross her fingers. When she tries to cross them her hand just starts to shake, it also shakes when she tries to lift her middle finger and pointer finger up strait at the same time and she cant raise them to the top. She tells me that her hand feels very weak and she is having trouble lifting things and typing using her left hand. I do not have the money to take her to a doctor right now and I'm just very worried. Please tell me what is wrong with her! thank you.