Hi, Sam. It's terrible to live with panic, but I believe that what is worse is not knowing what is happening to you at all.
With what you describe, I would urge you to see a doctor and not keep putting it off. It sounds like the first thing you need is a competent diagnosis and then a treatment plan. Rather than ask the group to diagnose, which it cannot do, I'm sure it would ease your mind to discuss this with a doctor. He or she can then refer you to a competent therapist as recommended.
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Anne-Marie, Site Administrator