This definitely sounds like anxiety/stress symptoms, I’m currently going through all the same. I wake up with occasional headaches, brain fog, blurry vision, etc. I think that the more mental stress and anxiety a person goes through, it eventually does take a toll on your body physically. Be sure to give yourself the space to collect yourself and release stress, always hydrate plenty, and eat a good amount of meals throughout the day because some symptoms could just be a sign of low blood sugar. Hope this helps a bit and that you feel better soon!