CW21,

You need to make an appointment to see a psychologist who specializes in anxiety disorders. Anxiety disorders are manageable, but very difficult to treat on one's own. A psychiatrist can prescribe medication, but for a reliable diagnosis and treatment program, you're better off with a psychologist who specializes in anxiety disorders.

The symptoms you're describing sound a lot like panic disorder. This is treatable with Cognitive Behavioral Therapy, Exposure Therapy, and meds. Meditation is a good supplementary practice, but you are very unlikely to get your anxiety under control through meditation alone--especially if you're just getting started with the practice.

Your anxiety about your symptoms is itself a standard symptom of panic disorder. Eventually, you'll need to get past the reassurance-seeking and learn to face your fears directly, accepting your worst-case scenario. This is not easy, but it is the only method that works. The fact that it is not easy is the reason why you need to find a therapist, and possibly meds as well.