My ET was discovered through blood tests to diagnose other issues (I ended up being diagnosed with collagenous colitis and pancreatic enzyme insufficiency which were the basis for the symptoms I was experiencing. The ET diagnosis was a by-product of this journey). The only ET-related symptom I had prior to diagnosis was bi-monthly migraines. They occured like clockwork every two months. Prior to menopause in 2008 I had migraines but they were random and essentially stopped at menopause. They started up again in June, 2022 and by that Fall began occurring bimonthly. ET was diagnosed in the Fall of 2023 and once I started HU they stopped and have not reoccurred.