don't lost hope emrn...have faith...the embassy won't bother you to call for an interview if they will just refuse your application,they can just give you a refusal letter if they are not convinced with your documentations.I find it your interview a very positive sign that you can have your visa soon, just the though of you being given the chance to defend and convince the VO in person through your interview is something you can hold and hope for.just a piece of advice,don't stress yourself with the negativity that clouded your mind,but focus yourself to your upcoming interview instead.always remember, all applicants have different cases and every cases are taken differently by the VO.just believe in yourself and have faith....smile and cheer up...