Well then, you must get the initial medical out of the way first. It's the big hurdle for the renewals are usually much more straightforward. Once you've done that you should be aware that, as a professional pilot, your livelihood depends upon your six monthly or annual medical. Unless you have prodigious loss of licence insurance or run a business on the side, your income walks finger in glove with your medical certificate.
That being the case then it's logical to be a little more careful about your health than the ordinary punter might be about his. Hypochondria is an undesirable manifestation but vigilance in matters medical is not.
In working with the UK CAA medical department you're dealing with one of the more pragmatic bodies in aviation medicine, dedicated more to keeping the aviator flying than to grounding him. In South Africa, as a contrary example, the Institute of Aviation Medicine employs some doctors whose digits you'd not want near your corpse, let alone your quivering recumbent form.
Good luck to you and a happy new year challenges conquered.