You need to do an urgent MRI head to look for any growth or tumor in your pituitary gland. Also imaging for other tumors like medullary cancer of thyroid, neuroendocrine tumors, carcinoid tumor and a lung imaging also should be done. The cause need to be found out first. Treatment depends on the cause. If treated early a lot of complications can be prevented. Also have an eye on blood sugar, blood pressure and your bone health.