Job interview - what do you think?

I have a job interview tomorrow for a second job (only 6 hours p/w) i already work 24 hours a week and im pregnant (6 wks) so i applied for a temp job (12 weeks) to earn some extra cash for baby. My partner is a chef at a posh restaurant and when hes at work i find myself bored. Do you think this is ok for a small health shop or too dressy? I wore it at my last interview and got it.. what do you think. Oh and ill be wearing tights and a blazer jacket aswell