In stead of just addressing Lanie's particular issue, I thought I should maybe give some insight to all those people out there who are in new jobs or want to be in a job and fresh out of college or university. These are just my own thoughts from years of experience, but having said that, take it for what it is. This is not meant to be directive, just thought provoking and hopefully helpful for you to make your OWN decisions with your future.
It goes without saying that the first job you get most likely won't be your dream job. Generally, it takes years to get that, so sometimes you just have to take a job that you may not love, but hopefully like, to take the steps to get that dream job. There are some employers that are very understanding and helpful when someone is new and others that expect you to jump in with both feet and expect you to swim to the top. The latter is the kind of employer that is very unrealistic. If you find yourself with this employer, just do the best you can and try to hold on until you can find something better. Hopefully you can catch on and figure things out to stay long enough to put the job on your resume. Gaps in a resume are always suspicious to a future employer. So, if you are really unhappy in the job, it is much better to try and stick it out until you find another one...try and find something about the job you do like. Having said that, if a job is literally making you sick, then get out of it because nothing is worth risking your health. If your anxiety gets in the way of your ability to interview well for a new company, then it might be best to take a break, regroup, sit down and figure out what your next move should be.
It is important to understand the skills that you have to offer and match them to a prioritized list of jobs that interest you. Go out and do some volunteer work while you are waiting for that all important job. It looks great on the resume and sometimes it connects you with people who know of a job that might suit you. If you can volunteer in an area that interests you, that's a bonus. A friend of mine couldn't get a job as a teacher, so she volunteered at a school and when a position became available, she was in the perfect position to apply and they knew her work ethic, so naturally, she got the job. Networking is key and as you go forward in your job and life you will come to recognize this.
Don't dismiss a job because it's not exactly what you want. It may lead to a job that is more interesting to you. In this economy it is hard to find work, so often people have to take something that isn't the most interesting, but if you do a good job, it can lead to something more to your liking. As Lanie's mother said "Take it one day at a time and do the best job you can."
Find outside activities that you enjoy especially if you are in a job that you find either boring or creates anxiety. To stave off depression or to quell the anxiety, having something outside of work to look forward to, is so important. Also, you never know, your outside activity could lead to meeting new people and more connections can help with finding another job that would be more suitable. I know of tons of people who have found jobs through networking this way. One of my friends got so burned out in her job that she quit and joined a gym. She made friend there and when one of the other members found out that she was looking for work, she new of an opening and my friend was no longer out of work and had an amazing job. Again, I don't recommend that you quit a job before getting another, but she was at the point of a breakdown and so she tossed in the towel on a very lucrative job and spent her days de-stressing at the gym. She was lucky, it worked out for her...not only did she get a ridiculously well toned body out of it, but she got a great job too.
Anyway, I know there is a lot of repetition in this message, but I want you all to realize that others have been where you are and it has been a challenge but it also, has worked out. I hope this has been helpful to, at least, some of you out there who are starting or wanting to start climbing the rungs of the ladder to corporate success. It isn't easy, but with the right people working with you and support behind you, it can be a really interesting ride.