So, if the hangover option is rational, isn't the apple pie one too? So, all that is left is anxiety.
Now you have the choice to put your conscious mind into the apple pie conclusion and tell yourself the rest if anxiety and whilst it is uncomfortable it has not rational basis when it comes to cancer therefore it adds no evidence for or against and certainly does not outrank a scan from a specialist or a doctor's professional opinion of your history & symptoms.
Now turn to things to get you away from obsessing and on with something more normal and healthy. Let it pass. Then you can look back and know it was just about the unpleasant feelings it gave you.