It sounds like your body is detoxing. Maybe because of the oil pulling your organs are now able to function the way that they are supposed to...which may lead to a more substancial monthly flow. It may only be for this month since there might be a lot of build-up that your body can now get rid of that it couldn't in the past. Just an idea. With your organs functioning better your hormones may be able to change and balance in ways they couldn't before and that may affect your period as well. ??? Keep us updated :)