Got ur pain n concern though it's unfortunate but common too, its very natural females Health n Fittness n consiousness revolves around menses.
Though so many causes n factors involved in getting normal n regular menses, but how's u maintain Ur daily routine Healthier habits of food exercise and sleep matter most.
Have faith in ur Dr.
Else couple of investigation like complete blood for Hb,
thyroid function test n USG whole abdomen and pelvis needed
Next Steps
consult AYURVEDIC college Hospital in ur city
Health Tips
warm buttermilk by adding cumin n carom seeds after'food, Laddus of Black gram flour shallow fried in Till oil made in Gud jaggery may be benefit u fruits like Pomogranate, Papaya, Pineapple also work.