There is brown watery smelly discharge after my period what is it?

Culture. that is likely a bacterial mixture. I advise you to get it cultured. It is likely there because u r vitamin D3 deficient. You will need enough vitamin D3 treatment to get to a level of 50-66 (not just 30). That usually requires about 5,000 units a day for 1year & then 5,000 u a day 5 days a week from then on. BUT 1st get your culture and D3 level checked. HRS, MD, FACC.