I am 33 years old lady. I am trying to conceive from last 2 years but was detected with pcod 2 years back. Now it's under control. I get periods regularly but flow is good for 2 days and very negligible on 3 day. I had tested cbc and thyroid last month and reports are normal. This month my last period date was 16-7-20 and my cycle is of 30 days. I am getting brown discharge from 11/8/20 which is very very light since 4 days. Even sanitary napkin is not required nor it falls on panty with no pain. When I go to pee I just clean the area n that time I could see very little brown discharge. What may be possible reason? Is it implantation spotting? If yes then does it lasts for so long?