I have had white discharge for about a year and I have already started puberty. Everytime I have discharge its white but dries yellow, is that normal.

No. No vaginal discharge is not normal. To similar question this was my answer: If you are 19 and no periods yet you are late. See gynecologist for evaluation and for lots of discharge. This is not normal. Look for endocrine problems esp low thyroid. Vag discharge could be yeast infection.