Don't know if this will help anyone suffering with health anxiety but heard this on TV tonight.
If you heard the sounds "clippety-clop" what would be your first thought? I bet most of you would say a horse! and not a unicorn!
Of course when you google any symptoms it can always come up with the worst case scenario but 9 times out of 10 the explanation is quite straightforward ie headache=stress, eyestrain etc. not a brain tumour.
Hope this helps

Doorbell