Blurr vision with headache. Also normal.

Since 2023, I have been experiencing episodes that start suddenly with blurred vision. After a few minutes, I develop a headache, usually around the temples, and the severity of the headache seems related to how long the blurred vision lasts. Sometimes I also experience nausea, goosebumps, fatigue, and a feeling that I might feel better if I vomit, although I do not always vomit. These episodes initially occurred about once every 3 months, then once a month, and recently every 2–3 weeks. In the last 2 days, I have had back-to-back episodes. Sometimes deep breathing or drinking water seems to help, but I am not sure. My blood sugar is normal, my general blood tests 3 months ago were normal, and an MRI brain scan done in early 2023 was also normal.