[pdovy]

Hard to extrapolate from just what you've said here, but:

- This level of anxiety, especially if you experience it in other settings, doesn't sound normal and you might well benefit from some combination of medication and seeing a therapist. Many, many people experience this - it's nothing to be ashamed of and these things can help.

- As others have said, most everyone finds interviewing stressful! That's totally normal. It's also (especially for an introvert) a learned skill that will get better with practice. Don't sweat it too much if your dream company turned you down. Most places will let you re-interview after a certain amount of time, so don't consider it a forever dead end.