Consider how much you have researched at two in the morning and then never mentioned at an appointment.
The symptom gets typed into a search bar, worried over for weeks, and then a doctor asks how you have been and you say fine. The conversation that could actually resolve it never happens. The browser tab stays open.
Saying it aloud to somebody who can help is the whole of it. Bring the list. It will feel like fussing for about eight seconds, and then it will feel like relief.