It’s a necessary skill to learn how not to take on others’ negative emotions. With anxiety, it’s very easy to internalize compared to other emotions, in my opinion. I’ve been on various forums like this over my academic career (College Confidential, The Grad Cafe, etc) and I see the same sorts of anxiety spirals each time. Somewhat disappointing to see that nothing really changed from when we were all applying to college 😉 A theme I’ve noticed is that a lot of questions rooted in anxiety/doubt have answers that are readily accessible to the person (e.g., plainly stated in a brochure, website, or email, or even if the answer is “there is no answer, hang tight”). But people tend to still ask them, hoping for a magical answer that will bring them comfort, which I find often creates more anxiety. YMMV.
Nonetheless, others’ anxiety is not your own. You don’t have to express your anxiety, anticipation, self-doubt, etc. in the same way that others do. You don’t even *have* to feel that way to begin with. Some people find comfort in commiserating. Some people find that it negatively impacts their wellbeing to see others express those sorts of emotions. Again, YMMV.