Hi

I understand your concern.

I guess it is not hallucination.

But it is overvalued idea or obsession.

If it hurts then only require treatment.

This kind of condition usually require detail evalution of mental status and thought processes.

So consult psychiatrist.

This kind of condition initially can be treated with low dose of benzodiazapine to counter your anxiety and further treatment is depend upon your thought processes.

Thank you.

Dear
Welcome to HCM
We understand your concerns

I went through your details. I suggest you not to worry much. This symptom cannot be termed as clinical hallucination. But can be termed obsessive thoughts.
You had that disturbing sensation once. You expected it to happen again and tried. Then you started experiencing it as you were expecting it. Then your body brought the familiar symptom because you are expecting it. Then you started worrying that the symptom is coming again and again and expect it. Body brings it again as you are expecting it. You become worried and so on. That is obsession in simple terms. Ignore it and the problem vanishes.
If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques which should help you cure your condition further.

Hope this answers your query. Available for further clarifications.
Good luck.