It could have been that you've just not been shedding as much each time you get af and this one was just a good clean out of everything in there. I have just had my own shocking one this week that had me quite concerned (flooding pads and clots like you wouldn't belive) but I had a mirena out last month so this is the first 'real' one I've had for 5mths. You don't think it could have been a chemical pg do you?