sick

I have my first interview this coming Tuesday and I feel ill prepared for it. I fell pretty sick yesterday (suddenly just came crashing down) and had to forgo my big plans to club with a person that I've been hoping to club with for a long long time. Now.. as I browse through the job scope and the company website for the upcoming interview.. I'm kinda getting cold feet. I really dunno whether is this what i want.. do i want to make this my career? People ask me what do I want to do... and I don't know. I tell myself that I'm open to many options.. HR, events, hospitality, marketing, shipping...but am I really? I have no idea what suits me.. or what I am capable of. Am I a dynamic sort of person (events) or will I just be satisfied sitting in the office doing mundane work (HR admin)? There are so many types of jobs out there.. so which is me?