Customer called me a dummy today

Had a customer who from the start was rude. She asked if she could type her card number in and I told her no. Then when she pulled out her debit card she showed it in my face and asked what's my pin? I told her IDK. She turned to her husband and told him don't ask her shit, she doesn't know shit. I walked off, asked another cashier to finish up with her and cried in the stock room. It sounds silly to cry at something like that but I was so mad because I can say anything back and HATE being talked down to like that. People please be kind to one another. You never know what kind of day someone is having.