Hello doctor, i was unwell with flu n sore throat in october first week. I was then on zincovit tablets for15 days till 30 oct. I am single and 40. I am sure that i am not pregnant. My periods usually are of 21-23 day cycle and last for 2-3 days. Dates were 11 Sep, 3Oct, 30 Oct. Now on 13 Nov, I see spotting kind of blood since last 4 days. Its threadlike discharge. This is first time i m getting spotting. How long will i get spotting? Do i need to take medicine. Pls suggest. Thankyou.