Hello
some amount of whit’s discharge is normal unless it is associated with foul-smelling or itching it is physiological.
Mild pain during periods is normal, if you have regular periods the flow should not be a matter of concern .you can get yourself tested few regular blood test thyroid profile and prolactin if these are normal then the flow amount should not concern much till time periods are regular.
if Weight is on higher side , you can try loosing weight, which also helps in period regularization.