Bilwa - Vilvam
Take some leaves of Bilva, (Vilvam) (English - Bael Leaves) and grind it to paste.
Take the paste to half the lemon size and mix in water and intake in empty stomach during Brahma Muhurtha (before sunrise).
Take full shower after one hour.
Irregular Menstural Cycles will be cured in due course of time.
Stomach pain due to excess discharge of blood will be controlled.
This is has to be followed strictly for a months time.