My corona test came back negative. I've spent the day using online symptom diagnostic checkers. Nothing that screams "my symptoms." But I keep thinking about how my sleep patterns have drastically changed over the past week. Normally I go to bed around 10pm, but that changed to 2 to 3pm. Also about the same time I stopped eating junk food and only ate veggies, fruits, nuts, some low fat chicken. Also started exercising. And then I started getting so irritable with intense surges of depression and SI, which could be caused by all of the sudden changes. So I read that sudden changes to sleep patterns and your circadian rhythms alone is like dropping a bomb to your system, which is well known to cause physical symptoms such as fevers, headaches, fatigue. I'm guessing all of the above is the most likely cause.