Most people don't have a perfectly regular period. Periods are especially irregular in the first three years that you have it. So if you have had your period for one year, you might have some more crazy periods ahead of you, but then you might get more regular with time.
If you don't get much more regular, you could talk to an ob-gyn about birth control pills. Birth control pills help to regulate a woman's period. So many girls are on the pill even if they are not sexually active.