Did you know that even though I am a nurse I once watched a girl have a seizure and didn't do anything?
You're a nurse. Why would you not help someone having a seizure?
I am a coward and I did not want to cause her more problems.
It is your job and responsibility to help every one of your patients. You could lose your job if this happens again. It sounds like being a nurse is not the best profession for you to be in.
Okay.
I don't know if you're serious, but if you you're feeling cowardly about dealing with people in need of medical attention, you should get into counseling ASAP, and if the issue isn't resolved, it's time to find another profession.