Do I have low vision with thin optic nerve?

It might be a good idea to seek medical attention since you're experiencing low fever, sore throat, etc.. Given your history of migraines, these symptoms could have various causes. If your symptoms are severe, worsening, or causing significant distress, it's advisable to seek medical help promptly.

Seeing flashes of light or "lightning" in your peripheral vision can sometimes be a symptom of an eye related issue. However, stress and anxiety can also cause visual disturbances, including perceived flashes of light. Meantime it may be helpful to practice stress management techniques, such as deep breathing exercises, mindfulness or meditation. If this also doesn't help then visit an eye specialist to get it checked.

If your eyes are burning, dry, or red, these could be signs of allergies, infection, or overuse. Before you try any treatment at home, do not forget to see a doctor to get the correct diagnosis. They can examine your condition and give you the right medication or prescribe eye drops. Keeping your eyes clean, reducing screen time, and getting enough sleep are also beneficial. 

You are experiencing an ailment called eye strain. Nowadays, it is common for people to experience problems with their eyesight. When your eyes are overworked they might be showing kaleidoscope colors or red. This is possible when the eyes are staring at light bulbs for too long. To help, rest your eyes by looking away from screens and lights. Eye drops or glasses may also be useful.