It is perfectly NORMAL, (sorry to shout but stop thinking it is abnormal), to be nervous at interviews.
It's important change in your life.
You could have a mild
phobia and some
Behavioural therapists may help you cope.
Being on edge can actually help you preformed better.
Think about, and write them down, (so that they can be remebered easier) the day before, your achievements, see which Positive words to say at an interview or job application.
Not all Interviewers are good, (some are rubbish), it could be their fault more then yours.
Pages to help you relax