hi being overweight can lead to period problems i think if you read up about it as you lose weight your periods well come back to normal. now that seems to me like a very good reason to get on that diet you have always wanted to do also some exercise would do you the world of good even just getting out walking but a good brisk walk doing around a couple of miles a day will help you to lose weight. so now's your chance to kick back. good luck
i havent had a regular period in 6 years when i do have one i spot for a week prior to starting and large blood clots. i am turning 30 in march 2014 i had my tubes tied 6 years ago with my after having my last child. i also am overweight.