Hi Elizabeth,
Maybe you already made up your mind, but both professions can assess and manage your leg pain. The approach will vary fro practitioner to practitioner, so I would suggest calling first to see what treatments they have to offer. While physiotherapists tend to be relatively homogenous with their treatment approach (mostly active therapy with assistance with therapy modalities and manual therapy), chiropractors can be more eclectic; some only do manual treatments like adjustments to the spine, while others use mostly therapeutic modality equipment, and others still who are more exercise oriented. Some chiropractors are a mix of all of the above. In the end, you should go with a practitioner who you feel comfortable with and is offering a treatment approach that makes sense to you.
Be well,