Will I have a chance at this job? Help!!?

I have a job interview but I did not list my current position on my resume. Help anyone?

I got a job interview for a position similar to my previous. I left my job 2 months ago to pursue another opportunity but it is not anywhere near challenging as my old one. So I saw a job listing where my skills and passion can be better put to use. I did not list my current position because I have only been there a short time. I did however include on the resume that I no longer work at my previous position. I was planning to tell them during the interview that I left to pursue an opportunity that I thought would be more challenging. And even though I am def. learning a lot, it did not turn out to be what I was looking for. Will this affect my chances? It was a complete career change by the way. Still helping people but in another capacity. I do not have a history of job hoping and I have a phone interview already scheduled. Do you think I have a shot?