This is very common problem now a days but don't worry.
lactation is directly related to diet and lifestyle of a mother.
Ayurvedic medicines like shatawari kalp or stanyajanan avleha gives excellent results.
Increase your milk intake, nutricious food.
As your baby is 5 month old you can try other food recommended by pediatricians for her.
Next Steps
For more information you can take my online consultation.
Health Tips
Closely Monitor baby's weight and hydration.