Thoughts go out to you from me and the other half mate.
Got a mate of my parents who had lung cancer, had treatment over 3 months (weekly, and for hours, that nearly killed him alone to be honest), got the all clear, went to celebrate on hols etc, got back, they mixed the results up, he's terminal. After mentioning this to only two people (complaining, as I do generally, though this time about our local hospital) I found out that BOTH the people had similar experiences. One of them got told their prostate cancer had not gone, when it had (and when they did tell them it had all gone it was by letter not in person and totally unexpected, though when he phoned they still said he still had it - had to do another round of tests to confirm he actually hadn't), and the other had a relative that cancer treatment worked on, and they too had were told they had still got it only to learn later that they hadn't got it still and the results got mixed up.
Life's like a box of chocolates, as the man said.
Make of it not just what you can, make of it EVERYTHING you can!
As said above, happens to us all mate.