There is a liquid herbal supplement called Black Cohosh, Licorice Compound. It does help bring on your period, but be aware that it can sometimes cause a painful period. You should also make sure you are not allergic to any of the ingredients before you take it.
Yes there are remedies to make delayed period regular. Normally delayed periods are because of stress or inadequate nutrition. However, herbs could help in problem with delayed menstruation. Liver cleansing herbs like dandelion root and burdock root are very good for this. If your have past experience of irregular periods then you should take chaste-tree berries as a morning supplement. Parsley is a very mild herb which a woman could take to see if it would help.