The very best of good fortune to you Piers.
Such times are always a concern, of course, but keep at the forefront of your mind, that at least you and the medical profession are doing something about the issue, and whatever the result of the biopsy, you'll be in a much better position to know 'what's going on', and whether, if another step is necessary, what it should be.
(Inaction never cured a problem)