My boss wrongfully accused me of stealing can I take legal action ?

Ok so yesterday my boss accused me of stealing a bottle of water and a choclate bar I work at a grocery store and I explained to her that I bought it at the cvs down the street and I didn't steal it, she brought me to her office to further discuss it and I showed her my cvs receipt and just said she was sorry and I went back to work. I don't see any reason why she thought I would steel it especially if she didn't see me take anything. Can I take legal action?