I have to nurse my 20 months baby regularly. After his birth my periods returned after 45 days and for three months I had two light periods 15 days apart. From 3 months to 20 months I had regular cycle. Though nursing never stopped. Current month again I had one regular cycle, and on day 13 light spotting started along with watery discharge, last upto 3 days. Why it comes back after so many months? Pls help checked. No pregnancy.