What was the feedback the last time? If you did a good interview, have the basic qualifications for the job, like the company and have 3 more months experience under your belt, why not? This is where it is good to have feedback from the previous interview, but still not too late to get it.
Say for example you did not talk about how well you can do a job (I had this once, she spoke forever about the company she worked for but gave me no inkling as to what she actually did or how she got on at the job she currently had).
You need to be able to talk about the skills you have, what you enjoy doing, how you approach your work etc. Best of luck.