How do I know if I am being reasonably anxious about something, or overreacting?

In all of my life, I have relied on the comfort level in a situation, my instincts I suppose you'd call it. The moment I start to feel I am not comfortable with the conversation I take a pause and relay what is being said. In terms of possibly overeacting again I would seek a second opinion and go through what is being said that is worrying me.

If you obsessively dwell on a specific matter and its taking over a lot of your thoughts, calm down

I think how you feel is the most important thing and if you are feeling anxious then it doesn't really matter if you're overreacting-the feeling is real for you

When it comes to mental health it is very rarely an "overreaction". We fear certain things and play them out in our heads-- worst case scenario, best case scenario, impossible things that couldn't happen in a million years. It's often because we desire preparation should we ever be faced with one of those situations in reality. It helps to have coping methods so that you don't get overly anxious and do yourself harm, like deep breathing or memorizing lyrics or poetry to take your mind off it.

To do that you must analyse yourself. Ask yourself why are you axioms about this thing? How does it affects you, what's the probability of it happening (from logic not hunch), then take care to keep your evaluation well rounded, for eg for each support you must look for a negative remark and vice verca. At the end of the day, you will find that being anxious isn't the solution even if it is reasonable to be so unless you are an extremely lazy person who needs suitable pressure to move. But being calm and cool helps a lot.

If you are feeling those legitimate feelings, you are never overreacting. Don't worry about how much you are reacting to something, but instead work on techniques to manage those reactions when it impacts your day-to-day life.

The best way to figure that out is to talk it out with someone who is objective and can help you step outside your bias and emotions that are causing the anxiety. It is also helpful to ask yourself if the symptoms of the anxiety are justified to the event or situation causing the anxiety. An example would be that everyone would feel anxious about an upcoming exam, but would that anxiety prevent you from being able to study is something you need to consider in full

Generally, when the anxiety is causing more harm than help, it's not reasonable anymore. That's a pin point I use all the time anyway c: