I have never seen a doctor about it. By the time I stopped coffee I already had some slight arrhythmia so I was quite scared and never pursued any more detailed info.
But yes, I stopped and got better almost instantly.
I think a doctor would recommend to see a doctor, here.
What can I say? Life was hectic and hugely stressful. Stress and depression have the tendency to rob you of your self-preservation instincts. I finally started recouping, some 10-12 years after I started having health problems, but what can you do. Better late than never.