My bleeding started at the correct time of my cycle, but i am having very light bleeding like spotting (today is the first day) I usually have heavy bleeding on day 1 and 2. I have been stressed almost throughout the mont.h. I also have put on a subsequent amount of weight in last 8-10 months and I am overweight. Can stress and weight gain be a reason of light periods? I had this issue earlier,  but My periods have been almost regular for last 2 years.