The Signal Cards
Twelve chapters in Worth Investigating each end with a one-page Signal Card — a place to write down what you've noticed, in your own words, to bring to an appointment. This is that same page, fillable on your phone or laptop. Choose the signal that fits what's going on, fill in what you know, and print or save it when you're done.
What you type here never leaves this device
There is no server behind this page. Nothing you fill in is sent anywhere, stored anywhere but here, or seen by anyone, including me. What you type is saved to this browser's local storage so you can come back and keep filling it in — closing the tab does not erase it. Clicking "Clear this card," on any card, deletes that card's saved answers for good. Nothing here totals, scores, or ranks what you enter, and nothing on it will tell you a diagnosis or a likelihood — a Signal Card is a record of what you've noticed, not an assessment.
If you'd rather not take my word for it, the code is at assets/signal-card-tool.js and assets/signal-card-tool.css — read it, or search either file for "fetch" and "XHR" and see that neither appears.
Choose your signal
Pick whichever one fits best. If more than one applies, fill in as many as you need — each is saved separately.
Choose a card above to begin.
Your Signal Card
What this is, and what it is not
This is a fillable version of a form that already exists on paper in Worth Investigating. It is not a diagnosis, not a test, and not a symptom checker — nothing you circle or type here is scored or weighed against anything. It exists to help you arrive at an appointment with what you've noticed written down in your own words, instead of trying to remember it under pressure in the room.
Every card carries the same warning the paper version does: if what you're experiencing is on that chapter's red-flag list, this card is the wrong tool today, and being seen is. Filling in a page is never the same as acting on it.
Looking for the two-week symptom tracker instead — the day-by-day record that usually comes before a card like this? Go to the Symptom Tracker.
Worth Investigating has not yet had its final author read-through, so the exact wording on these cards may still change before the book is published. How I research and write