this is the second time I've had it put in (7 months ago) after I delivered. this past week I have started to bleed for the first time since I've had it in. I've had some mild cramps so I have assumed its my period. but the clots of blood and how long I've been bleeding makes me think it could be something else? is it normal to start bleeding after so long or should I go see my doctor? I don't remember bleeding at all the first time. thanks for any help.