Often when we have been working within an industry or for the same company for a while, there comes a time when we feel the need for a change. Sometimes moving to another company similar to the one you previously worked for is enough of a change but for some, they want a new career altogether. Changing careers can be a nervous time, you may need to go back in to training or start off in a lower paid position and work your way up. The industry may be new and a bit alien to you, so you could find yourself out of your depth if you try and take on too much. There are also money worries with changing jobs especially if you do not already have a new job lined up to go straight in to.
If a job move is really what you need, then you need to try and find a way to manage with the upheaval for a few months. Often saving enough money to see you through a few months of job hunting is a great way to give you a little more peace of mind.