When i run my fingers down my shin it feels like the bone is bumpy... is this normal?

This is normal: It is normal to have some uneven feeling of your shin. There is nothing to worry about, unless there is pain, a palpable mass, or recent injury to that area. If there are no other symptoms and only a slight bumpy feeling to that area, then there should be nothing to worry about. If other symptoms develop, then you should see your primary care doctor.