I had that happen when I took a test for a job someone was "holding" for me and then two other agencies called and wanted me. No one had told me that could happen and I had not imagined it.

I would make myself a little story; decide to work at this job for 6 months for the experience and then re-evaluate what you want to do? If you can't get the job to work, interview again for a stockroom position or something else where you have picked up some skills along the way (you might be great at customer service and decide to be a receptionist, for example, or for a large store like Home Depot, Staples, or Best Buy or maybe you are good on the cash register and decide to work in the credit or "money" portion of a large department store like Macy's).

Make a little plan of what you want to learn, do, how you would like it to play out and then work in that direction. Having a plan of your own makes work more "normal" and feel more in your control and is a bit more interesting because you aren't just at the mercy of what's "out there" but are looking for specific next steps that you want for yourself.

This book was really helpful to me in my work life: http://wishcraft.com/