Long time traders, have you noticed changes in your psychology?

I am quit a rational person and I do not fold easily under pressure. Still I feel like trading is pushing me to the edge of my mental capacities but in the same time is giving me an improved stoic mindset. I don't panic sell, fomo or fall in the other usual trading traps. But I am seriously challenged still, I feel like someone is holding a gun on me and I have to ignore him.
I take the hits but I'm a bit confused. So I thought to myself "maybe it's just the lack of experience".
Thus comes my question(s).

What does trading feel like after trading for an extended period of time?
Have you noticed changes in your way of thinking?
Did it improve quick decision making?
Do you feel stressed or anxious when a trade is not going your way?
(Will I die at 35 of a heart attack?)

Edit: Today I felt way more confident trading, it was like a peaceful day of summer with cool wind in my hair. I will keep working on it. Thanks a lot for your help guys.