I had been feeling a lot better for a few days, then suddenly the past couple have days have been worse. I don't know why but I'll get this aura type feeling and I'd go look into a mirror, my eyes would be dilated almost to the iris. I think that it's because my brain is not getting enough oxygen? Any ideas on what this could be, I've been getting a lot of stiffness in my neck as well. I researched a few things online and I came across Meningitis, Which I have been vaccinated for. Then I came across extra CSF... All of the symptoms of PCS and these are similar. I'm kind of scared to be honest...