Alex
I am not sure how to banish thoughts like these. The first step as I see it would be to book an appointment with your physician, and then go from there. This might be something, and it might be nothing, however until you find out then nothing can be done about it. I sincerely hope this is nothing to be worried about but if you are having these feelings then what you are going through is real enough. Again I hope and pray that this is nothing to be worried about. All the best.