I was diagnosed with graves' disease at 16, became pregnant and now i have a hypo thyroid , do i still have graves? will i change back to hyper?

Treatment?: You failed to mention if you had received treatment for your overactive thyroid. Was the graves' disease confirmed by a specific blood test, or just a clinical diagnosis by your doctor. If you truly had graves' disease, you still have it, but it may have been treated or in remission. Hyperthyroidism can return at a later date, but the longer you go the less likely it becomes.