Is it possible for the physical symptoms of anxiety to start before you actually “feel anxious”? 

Like I can usually tell that I’m anxious by a tight feeling in my chest and shortness of breath. But if I get randomly nauseous and then a few minutes later get the tightness in chest I can’t tell if I got anxious because I was nauseous (I have emetophobia) or if the anxiety is what caused my nausea and I just didn’t realize that I was anxious until the nausea had already started