According to the data you provided (lack of sleep, anxiety, vomiting, diarrhea, cold sweats, shaking, tests for diabetes and suprarenal gland normal), you might have experienced hyperthyrodism.
Hyperthyrodism is a condition in which the thyroid gland is overactive, thus it produces a surplus of thyroid hormones. The most common symptoms include: weight loss, anxiety, weakness, fatigue, irritability, sweating and pretibial myxedema. The person might feel heart palpitations, and/or arrhythmias. Nausea, vomiting and diarrhea might also be present. Most of these symptoms are due to the increased metabolism, since the thyroid glandâs hormones control the metabolism.
You might want to visit an endocrinologist for a physical examination and hormonal laboratory tests for the thyroid gland. If elevated thyroid glandâs hormones are detected in the blood, the doctor might recommend additional tests (Ultrasound scan of the thyroid gland, thyroid scintigraphy-method in which radioactive iodine is administered). The treatment would depend on the exact cause (located in the thyroid gland itself or in the hypohysis-controller of the thyroid gland).