Hi, wonder what may be because my period is late 3 months. regards camila?

Possibilities...: First thing to check for is pregnancy. If this is not the cause then you need other tests in order to find out if there are other problems like hormonal( thyroid, prolactin, testosterone, for example) imbalances. Other possible reasons: stress, abrupt changes in your diet or excessive exercise. You need to see a gynecologist in order to get a definite diagnosis.