Starting a new job can often be very exciting. It may be that you have waited a long time or had to undertake a lot of training /further education to get in to the role and therefore you will often have high expectations.
For some people, the initial excitement of starting a new job lasts for a good few months up to a year or so, and this is often normal as your new job becomes more familiar. If however you are finding that you are disappointed with your new position within only a week or so of working there, it may be that it’s not the right job for you.
It is important to give the job time, as initially you may have to undergo a lot of training or have someone work closely with you. After the initial period is over you may start to enjoy your job more and actually find that it is what you had hoped for. If after some time you are still not happy you need to establish why. It may be that you do not like the way management treat you or that you do not get along with your work colleagues. This may not be anything that you have control over so you will need to make the decision as to if you can put up with it or want to leave.