Interview outfit HELP

I am going to the most important interview in my life (healthcare, if that helps) on Thursday.

I am 5 foot, 120 pounds, and 10 months post partum. Everything business-y I own was when I was 20 pounds less ---pre pregnancy. Safe to say, nothing fits me anymore.

I am leaning more towards a pantsuit set in navy or dark gray.

Please help me. Any inspiration, look books, links, etc helps, with shoes, please.