U should not worry. This seems to be healing fracture
not completely united yet. It may trouble u for some time but not going to last long. The small chip u r talking about needs radiographic and clinical evaluation for comments but usually chips in long bones like tibia
will eventually unite and become pain free. Avoid putting leg in dependent position for decreasing swelling during day and foot elevation during night. If such problem lasts longer than 4-5 months then u should visit an orthopaedician for radiologic evaluation of fracture fixation.