I have irregular periods ,im obese im having my periods after every 2 months ,the last i had was on august ,but this month i didnt get my periods instead a dark brown or black colour discharge when i urinate is been appeared.This is going on now for more than 2 weeks ,in the middle once for few minutes i got somthing like periods and then it stopped.Im worried about what is going on..Please do help me.thank you