Your story sounds so familiar, but for me the F and the T should be swapped. After years of trying, I finally got to a point where my logical side was no longer hampered by a boiling-over of emotions. I could actually think things through clearly without applying an emotion to each new thought.
Mind you ... emotions will still get the better of me sometimes, especially when I'm stressed. But, my logical side is stronger now, and it has the ability to calm my emotional side. It's kind of weird when it actually works.
For example, the other night I got caught in a "worry loop." I don't know if this is an intuitive's problem, or just INFJ, but let me explain.
Prior in the day, I realized that I'd forgotten to follow up on a work project that I should've been over and done with. I only realized it when I had to report to my supervisor about the states of my projects. It was one of those brain-fart kinds of situations. "Aw, how did I MISS THIS?!"
That night, without really thinking about it, my brain constructed a series of events that were definitely going to take place and eventually lead to me getting fired. I convinced myself that it was going to happen and I started pacing the house, obsessing about the scenario.
Logic stepped in and said, "There are multiple ways this event could play out. See how many end with you getting fired." So, I constructed several scenarios and played them all out. Only the first one ended with me getting fired. All the rest of them ended with my supervisors saying, "Oh, yeah? Just finish it."
But, the worry still wasn't going away. It was too late, the cover had come off the kettle and the water was boiling over, out of control. So, turning inward, I adressed my worry, "You are being destructive. Logically, I really have nothing to worry about, and even if I did have something to worry about, I have no ability to change it RIGHT NOW. SO WHY ARE YOU STILL HERE?!"
The worry went away.
It was as strange as it was a relief.