I let a woman die in front of me because I was too afraid to give her mouth to mouth and in doing that, I killed her

Its been 3 years since the incident. I was working as security personnel in a shopping mall and I was sitting next to the elevator. An old woman came through the lift. I don't know what happened to her, but she fell down. When I rushed over to her, she was dead. Well not dead, but half dead. She was still alive, but couldn't breathe. She was choking on something. Then I checked her mouth to see if she was choking anything and I removed it. I knew CPR, I knew mouth to mouth too, but I didn't do it to her. I was afraid that if I do it, she might claim that I sexually harassed her or something. I called ambulance. They came to pick her up, she died on the way to hospital. The cause of death was not the pneumonia she got, it was because she didn't get enough oxygen. They say if she was given mouth to mouth, she might have survived. But it's too late now. She is dead and I keep thinking about it everyday, how I could have saved her but didn't. I'm just a coward who couldn't save a woman.