My gum where my wisdom tooth is supposed to come in hurts?

Yes when wisdom teeth erupt it hurts, because they have to perforate the gums. If your tooth isn't visible at all in your mouth, it will hurt until a part of the tooth creates a perforation, and you cant do anything to prevent, just careful when you eat. If the tooth is partially erupted then careful, it might cause pericornaritis , or infection of the surrounding tissue of the tooth, in this case you need to see a dentist that decides what to do