I was waiting at a local bar to meet up with my friends when I was caught short and had to go to the ladies. There I discovered that my period had started early and my undies and pantyhose were stained. I through the hose away but tried to wash out the stian in my undies in the sink. When in walked another women and smirked when she say me washing them. I meekly tried to explain and she offered me a towel from her bag, laughing as she told me whe always had a supply wheter it was that time or not. I was really mad at her and she ssid well, don't let me stop you and i flipped. I slapped her with an open hand, so hard she passed out. I was terrified that someone would come in that I picked her up and shoved her into a cubicle. I feel awful but when I sat her down her dress rode up her body and I took of her thigh highs and her undies to. I took a towel from her handbag and put thes things on. I left in a hurry and text'd my friends to meet me elsewhere. I feel awful for doing that to her but I was stressed.