Clotting is normal princess blood clots when it dsnt have a chance to naturally flow down. So for it, it clots and its a form of your body cleaning =) no worries
i would not worry about it, tmi but my period is very clotty too. certain people just have clotty flows, if you are getting many clots larger than a quarter I would speak to a doctor, it's probably nothing but just to be sure!