Period running more than 2 week.

I have diagnose with PCOS in 2016,i am obese and treatment by homeopathy medicine ashoka, and calcaria carb in 1 year and recent 6 month i don't have any homeopathy treatment. 21.11.17 was my last period and stay for 5 day. In  December the period was totally absent, in January month I have 3 times spotted for 1 day 10.1.18,20.1.18 and 27.1.18 and in February i have diagnose with severe deficient of vitamin D 9.18nm and DV 60k medicine was given for 12week by dr. in every week once a tablet.After 2 week 2 dose taken the period was start(20.2.18) and Period was very light but prolonged, 16 days and still now the period on going..I don't take the Dv 60k medicine. I have also normal TSH,T4 ,T3,LH,FSH, Prolactin, haemoglobin (12.3 gm/dl),and normal HbA1C and Fasting blood glucose.