Sometimes my vision feels brighter and almost unreal. i have a huge fear of fainting. does this sound like warning signs for fainting or just anxiety?

Symptoms: I would get an examination, these could be symptoms of an ocular migraine, or even seizures if you feel like you are losing consciousness. A full exam including listening to your heart and assessing the regularity of your heartbeat, thyroid, A full history and physical exam are indicated. It may just be anxiety as well, however the differential is large and worth looking into things in my opinion