Anxiety can cause every symptom that you mentioned.

As you stated earlier, memorized symptoms....

PTSD is very good at triggering memorized symptoms. They manifest like the real thing. Think 'flashback,'

Stop making up reasons to claim the worst case. Dehydration does not increase sensitivity.

STOP checking for symptoms. If you look for a symptom, your mind will find one. The power of suggestion is powerful. The blurriness in one eye is ridiculous.