Could a small hard lump right below your ear next to jaw bone that hurt be related wisdom tooth coming in?

The answer is: no

A wisdom tooth is the third molar. The wisdom teeth usually erupt between the ages of 17 and 25. There are four wisdom teeth, one in each corner of the mouth. Wisdom teeth can sometimes become impacted, which means that they do not erupt properly. This can cause pain, swelling, and infection.

The hard lump you are describing is likely not related to your wisdom tooth. It could be a lymph node, a salivary gland, or a tumor. If you are concerned about the lump, you should see a doctor to have it checked out.