I've had a Diva for probably a little over a year now, and it's really only just occurred to me to ask about this. In the first two days of my period I can't wear it to bed because the seal will break in the night and there'll be big spillage. After the first two days it's fine, but for the first couple of nights I've just been using pads because I can't be bothered. Is there something I could be doing wrong? Or do I just sleep too energetically for the cup perhaps?