I had gotten the depo shot about 3 months ago, havent had my period since. Today I experienced heavy bleeding and cramping and these came out of me. I went to the hospital and they did blood tests and urine tests and said it was just a buildup of uterine lining and tissue that needed to be flushed after 3 months of not getting my period. Just wondering if it looks like that, or if it could be a possible miscarraige.