Hi dear, I understand your trouble. Prolonged period along with its discomfort comes also with weakness due to loss of blood. You should start taking iron reach food like spinach, apple etc.
PCOD is chronic condition there are many medicine available which cures it. But one need to know the whole case history to prescribe.
Next Steps
you should consult homeopathic doctor for your proper management
Health Tips
Take good rest and hydrate well. You can also use keep hot bags in your lower abdomen. Drink ginger tea.