Am I overreacting? What the size of it tells you
A reaction that does not match the event is worth writing down in detail. What to write when the size does not fit what happened.
The question underneath the question
Am I overreacting is almost never a request for a measurement. Nobody actually wants a number. What the question is usually asking is whether you are allowed to be this upset — whether the reaction will be accepted, or whether you are about to become the problem.
You can hear it in the clause that always follows: it was such a small thing. That clause is not information about the event. It is a pre-emptive apology for the size of your own response, offered before anybody has objected to it.
So the first useful move is noticing which question you are asking. If it is the permission question, then no amount of evidence about the event will settle it, which is why people can argue themselves in circles for a week about whether a five-minute conversation was really that bad.
Why size and event so often do not match
The plain version: the same event does not mean the same thing to two people. A cancelled plan is an inconvenience to one person and a piece of evidence to another, and the response tracks the meaning rather than the size of the event. Nothing exotic is needed to explain a big reaction to a small thing. Different meaning is enough on its own.
Meaning is also mostly invisible, including to you. What you get in the moment is the output — heat in your face, flatness in your voice, the sudden urge to leave — and not the reading that produced it. That is why a reaction can feel as though it came from nowhere and still be entirely proportionate to something.
Worth noticing too that "too sensitive" is not an explanation of anything. It is a description with a judgement folded into it, and it has the same defect the permission question has: there is nothing in it you can act on. Sensitive to what, and in which specific second, are answerable questions. Whether you are too sensitive in general is not.
It is worth being clear about what this is not going to do. It is not going to tell you what your reaction means, or where it learned its size. An article cannot know that about you, and honestly it is not the most useful next step anyway. Describing the reaction accurately is.
What to write when the size does not fit
Five things to write when the size does not seem to fit the event.
One. Describe the exact second it turned. Not the situation — the second. Which word, whose face, what was happening in your hands. Almost everyone can find it and almost nobody has looked at it, because the whole thing gets filed as one undifferentiated bad event.
Two. Write what you thought it meant about you in the moment, present tense, in the crude form it actually took. That I do not matter here. That I am the difficult one. That nobody was going to say anything. This is usually the sentence that explains the size, and it is usually shorter and blunter than you would like to admit in writing.
Three. Write what you would have needed to happen instead, specifically and modestly. One person saying that was out of order. Being asked. Being told on the day rather than a week later. Naming it makes the reaction legible in a way that arguing about proportion never manages.
Four. Write whether you have felt this exact size before. A yes or a no is a complete answer and you do not owe yourself anything further tonight — reaching for more is how a twenty-minute reflection turns into a bad evening.
Five. Ask what it would take to feel settled about it now. Sometimes the honest answer is a short conversation. Sometimes it is time. Sometimes it is deciding you are not going to raise it and accepting the cost of that on purpose, rather than by default.
Why this helps
Once the reaction is described rather than graded, the permission question quietly stops mattering. You are no longer trying to establish that you were entitled to be upset. You have a page that says what happened and what it landed on, and that is not the sort of thing that needs a ruling.
The other gain is practical. "I was upset out of proportion" gives you nothing to do. "I needed one person to say that was not okay, and nobody did" is specific enough to act on, or to let go of deliberately.
When you are asking because someone told you so
One careful paragraph, because plenty of people arrive at this question from outside rather than inside. If you are asking whether you overreacted because somebody routinely tells you that you do — that your reactions are wrong, that you are too sensitive, that this is simply your pattern — that is worth taking seriously in a different way from the rest of this. Being told your responses are invalid, consistently, by the same person, is not feedback.
It is very hard to assess that from inside the relationship, which is exactly why a written record helps and why an outside person helps more. A therapist, or a friend who is not involved, can hold the events up next to each other in a way you cannot while you are still busy checking whether you are allowed to be upset.
And if any of this reaches the point where you are thinking about hurting yourself, please put it down and talk to somebody tonight. In the US you can call or text 988, the Suicide and Crisis Lifeline, any time. You do not have to be sure it is serious enough to call.