What do I do if someone's calling my husband's job, posing as me?

My husband had to make a trip home today to get his no slip shoe covers(he works at a restaurant) he is a manager, any way, he said "Willie Mae said that you called, she said your wife called" Um okay first off, I didn't call him today, I mean like what does this mean? I am freaked because I am scared someone is pretanding to be me! thanks for replies!