My fingernails and skin all around hurt really bad after getting acrylic nails at the salon. The guy filed and buffed way too hard causing pain and bleeding. What should I do? I don't think it'll just go away.

Doctor can check... A primary care doctor or a dermatologist can examine the fingers if a person is worried about how much of the skin got sanded away. Most likely, the skin will heal up back to normal (maybe with some color changes that should normalize over time), because if the sanding was really deep, the person would have screamed and pulled her hand away. Neosporin may help skin healing.