Thanks for asking your question on Just Answer. It is not normal for a kitten to be so jumpy and anxious. I would make sure that she has had a physical exam by a veterinarian to rule out any underlying medical problems. If she is otherwise healthy, you can consider a multi pronged approach to solving this issue:
1. I would start with a product by Vetri Science called Calming syrup. It is a natural product for cats and dogs and I have had great results using this for anxious animals.
2. You can use a Feliway aerosol diffuser which emits pheromones that only a cat can smell. The cat usually will become less anxious.
3. If those products don't work, some of my clients have had great success with "Rescue Remedy", available at a health food store. This is a natural product as well that is safe in cats.
4. You need to also work on the desensitization and socialization aspects of your cat's problem. You should gradually expose her to noises, people, and other things which scare her. Use treats that she likes at a distance where she is not scared. Over time, close the distance and feed her treats as long as she ignores the situation. If she is stressed, you've moved too quickly and need to increase the distance between her and the thing she's scared of. Eventually, she will be o.k. with the things she was afraid of. This technique is called desensitization and counterconditioning -- here is a link to more information about this:
As far as declawing is concerned, please realize that there are other options -- there is a product called Soft Paws which are nail caps that cover the nails and prevent scratching and clawing. Declawing is an amputation and is very painful. Kittens can have lifelong complications from this so please consider your choice carefully.
I hope this helps - please let me know if you have more questions.