What causes 2 week long light spotting? is it my period? not enough for tampons or pad just panty liners.

Depends.: Light spotting for two weeks is not normal and it's probably not your period. There are many potential causes for abnormal bleeding. If you are using some method of birth control it could also be breakthrough bleeding. Sometimes things like this will resolve without treatment. If the problem persists consult with your doctor. Hope this helps.