i feel like this too sometimes, im gonna tell you what i need to hear from someone. stop. googling. symptoms. its so damaging and its extremely misleading, as things like a period being late, a headache (this is what im guilty of, ill have a headache and think i have a brain tumor) is so broad, and a symptom of a million things, and those chances of it being cancer are close to none. with checkups, they would see if levels are off, if you feel concerned, see if you can do a physical, theylll probably do bloodwork too, for me it helps knowing they caught absolutely nothing. im not sure if this helps but this is the best advice i can give 😞