Well, you have a job. So you interviewed correctly. A lot of people who go on a job interview tend to just sort of walk in and wait for the employer to figure out why to hire them. It's a passive approach. I basically tell people that if you haven't been able to convince them during your interview that they ought to hire you, they're not going to get back to you after a week, two weeks, or three weeks.
New grads tend to be very susceptible to that kind of situation.
Forget about it and move on to the next interview. I think new grads have a fear of job interviews because they have very little work experience. If you can't understand that before you go into the interview, you have no business being there, because you're going to blow it. Instead, identify one company you really want to go after. Go to the library, go online, get your hands on their annual report.