You're not being "irrational" per-se...you're just "thinking the wrong way"!
Read my previous post again, and again.
Realizing those points helped me...a LOT.
Ask yourself...does every little event I notice about myself = doom & gloom?
Of course not!!! You are NO DIFFERENT from a person who doesn't have HA symptoms.
Your misdirected THOUGHTS & FEARS are the only difference.
And again >>> Thoughts & Fears cannot possibly hurt you.
Therefore >>> What you're REALLY afraid of is...A THOUGHT
Do you see how off-kilter thoughts/fears can be so ridiculous?