"Is it possible to hypnotise me and get me to forget I was ever nervous, or is this just something in the realms of stage hypnosis?"
You cannot remove a memory without doing a lobotomy! You can often stuggle to locate one, as we all know, but it's there deep in the memory bank.
What you can do with hypnosis though, is change the reaction to the memory, and dampen down the flight or fight instinct, but only if the reaction to the memory is irrational or exaggerated. If for instance you fell off a ladder and injured yourself, it would be perfectly rational to have a fear of climbing up ladders, but it would be irrational to have a fear of stepping into a lift after such an accident. This can happen because whenever we do something, the mind looks for a similar experience to make a judgement as to whether we are safe or not. In this case the mind has made an incorrect judgement and linked two similar things together “height”.
Now all hypnosis has to do is tap into where the memory is held, in the subconscious (also called the unconscious) mind and break that connection, and re-structure it so that the fear for the ladder-climbing is put back into proportion, and the fear for the lift is changed completely because there is no memory of an unpleasant instance involving lifts in the first place.
The mind is wonderful at keeping us safe, and no one would want this aspect of our mind removing, in fact you can’t unless it is physically injured, but it can go wrong from time to time, and cause all sorts of adverse reactions to the most mundane of situations and objects. More often than not we can sort this out for ourselves, but every now and then, the mind needs a helping hand!